Question: Bianca's Smut Shack became a popular theme camp at annual gathering held at which city ?
Sentence (from "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.
Relevant evidence: No