Question: Bianca's Smut Shack became a popular theme camp at annual gathering held at which city ?

Context paragraphs:
Durham Miners' Gala: The Durham Miners' Gala is a large annual gathering held on the second Saturday in July in the city of Durham, England.  It is associated with the coal mining heritage (and particularly that of miners' trade unionism) of the Durham Coalfield, which stretched throughout the traditional County of Durham.  It is also locally called "The Big Meeting" or "Durham Big Meeting".  In the context of the Durham Miners' Gala, "gala" is usually pronounced /ˈgeɪlə/ rather than the more common pronunciation /ˈgɑːlə/ .

The Kings of Clonmel: While at the annual Rangers' Gathering, Will is informed by Crowley that Halt will not be able to attend as he is investigating things in the west of the country.  A mysterious group of people are going around, recruiting people and stealing gold in an unlikely fashion.  Meanwhile, Halt is watching the group, who are acting in a small village called Selsey, in Araluen, although not governed by any fief.  He manages to stop them burning the boats, which they put as an "omen" to their god of gold, Alseiass.  He finds that the plot to build a golden altar that is fake, they are stealing the gold, and making the altar out of wood, coated in thin layer of gold.  He manages to capture their leader, and expel the group from the village.  Halt is puzzled, as when the leader sees him, he says, "What are you doing here?" .  Halt is sure he and the man never met before.  Back at the rangers Annual Gathering, two Ranger apprentices graduate at a ceremony, where Crowley asks Will to take care of three more apprentices for a while.  He does this, and Crowley tells him that he has been moved to Redmont fief to share half of it with Halt.  It is where he grew up, and where Alyss, (his girlfriend) lives.  Halt's wife, Pauline also lives there.  Will rides to the fief, where he is greeted by a feast made by his childhood friend, Jenny.  He greets Pauline, and Crowley, then Halt arrives.  Crowley assigns Will, Halt, and Horace (Will's current best friend, and a knight) to investigate Clonmel.  Halt tells them he knows the king, and when they ask how, he tells them he is the King's brother.  They go around, investigating the Outsiders (the group who are stealing gold).  When Halt's brother tells them he made a deal with the Outsiders, he is knocked out by Horace, and Halt takes the king's place (they are twins).  The Outsiders' leader, Tennyson, is angry, and challenges Horace to duel his two giant bodyguards.  Horace accepts.  Will meanwhile, is investigating a camp, and he sees that Tennyson has recruited three Genovesans (foreigners; assassins).  He tells Horace and Halt this, and Halt is expecting treachery from Tennyson.  The duel proceeds, with Horace barely winning against the chain and mace used by the first giant.  Horace is then drugged by the assassins, causing his eyes to waver a lot, and he is unable to see clearly.  Will shoots the second giant in the arm, after which he manages to accuse Tennyson.  Tennyson escapes, though not before killing Halt's brother.  Halt abdicates the throne to his nephew, Sean, a warrior and worthy king.  They begin to follow Tennyson's trail to Picta, thus ending the book.

Congress of the People (1955): The Congress of the People was a gathering held in Kliptown on 26 June 1955 to lay out the vision of the South African people.  The Freedom Charter was drawn-up at the gathering; the charter became the manifesto of the African National Congress and a symbol of internal resistance against apartheid.

Eelpout Festival: The International Eelpout Festival is an annual gathering held in the town of Walker, Minnesota.  It celebrates the eelpout (or burbot, scientific name "Lota lota"), an indigenous bottom dwelling fish that inhabits the regions lakes, in some cases being found as deep as 300m.  The fish itself is described as a cross between a catfish and eel, giving it a slender disposition but retaining a tapered midsection with a full complement of pectoral and caudal fins.  While "Lota lota" is known locally as eelpout, eelpout also may refer to a family of marine fishes.  Leech Lake is known for its exceptional walleye fishing, making this festival a banner for the often forgotten eelpout.

National Oldtime Fiddlers' Contest: The National Oldtime Fiddlers' Contest is an old-time music competition, festival and musical gathering held annually during the third full week in June, in Weiser, Idaho.  It is often referred to as 'Weiser'.  The contest draws musicians from across the country.  Nearly 7000 people come for the week and almost 350 fiddlers compete in 8 divisions.  In addition to the contest there are workshops, performances, a battle of the bands, a parade and a carnival.  The contest is held at Weiser High School.  The competition is held in the gymnasium, and most of the contestants camp in the school’s sports fields.

2012 Republican National Convention: The 2012 Republican National Convention was a gathering held by the U.S. Republican Party during which delegates officially nominated former Massachusetts Governor Mitt Romney and Representative Paul Ryan of Wisconsin for President and Vice President, respectively, for the 2012 election.  Prominent members of the party delivered speeches and discussed the convention theme, "A Better Future."  The convention was held during the week of August 27, 2012, in Tampa, Florida at the Tampa Bay Times Forum.  The city, which expected demonstrations and possible vandalism, used a federal grant to bolster its police force in preparation.  Due to the approach of Hurricane Isaac, convention officials changed the convention schedule on August 26, 2012; the convention came to order on August 27, 2012 and then immediately recessed until the following afternoon because of the risk of Isaac hitting Tampa.

Bianca.com: bianca.com, informally known as Bianca's Smut Shack, was an online community created on February 14, 1994, by a group of Chicago, later moved to San Francisco, dot-com software developers, including David Thau and Chris Miller.  bianca was one of the web's first 500 content creations and was the world's first web-based chat room.  It later also became a popular theme camp at Burning Man.

Burning Man: Burning Man is an annual gathering that takes place at Black Rock City—a temporary city erected in the Black Rock Desert in Nevada.  The event is described as an experiment in community and art, influenced by 10 main principles: "radical" inclusion, self-reliance, and self-expression, as well as community cooperation, civic responsibility, gifting, decommodification, participation, immediacy, and leaving no trace.

Jalsa Salana: Jalsa Salana (Urdu: ‎ ; English: Annual Gathering ) is the formal, annual gathering of the Ahmadiyya Muslim Community initiated by Mirza Ghulam Ahmad, founder of the community who claimed to be the Promised Messiah and Mahdi of the end days.  Usually, the gathering spans over three days, beginning on Friday after the Friday Sermon.  Typically, the flag hoisting ceremony is used to identify its commencement.  Although there is a central, international Jalsa attended by Ahmadis from across the world, many of the countries hold their own national jalsa, sometimes attended by the Khalifatul Masih.

Sahavas: Sahavas (Vedanta - singular & plural, also sahawas; sahavasa) literally means dwelling together, close companionship, or in the company of.  It may also refer to a spiritual retreat or a gathering held by a guru or master so that his devotees may enjoy his company, i.e., his physical presence, or a gathering in his honor where his followers meet to remember him.

Supporting paragraphs: Bianca.com Burning Man
Answer: Black Rock City