The GEM Hotel brand is a neighborhood boutique hotel collection in Manhattan, New York City.
 The brand, which was launched in 2007, currently has three locations: The GEM Hotel Midtown West, The GEM Hotel SoHo and The GEM Hotel Chelsea, which was voted Best New York City Boutique Hotel in 2010 by Citysearch.
 A fourth location, The GEM Hotel Union Square, is under construction.
The Hotel Chelsea – also called the Chelsea Hotel, or simply the Chelsea – is a historic New York City hotel and landmark built between 1883 and 1885, known primarily for the notability of its residents over the years.
 The 250-unit hotel is located at 222 West 23rd Street, between Seventh and Eighth Avenues, in the neighborhood of Chelsea, Manhattan.
 The building has been a designated New York City landmark since 1966, and on the National Register of Historic Places since 1977.
Nicole Burdette is an American playwright and actress.
 She wrote the play "Chelsea Walls", which she adapted to film in 2001.
 She is a co-founder of the Naked Angels (theater company).
 She also gave the company their name.
Chelsea Harbour is a contemporary mixed-use development in West London, situated in its Sands End area, along Chelsea Creek, the historic southeastern boundary of the London Borough of Hammersmith and Fulham with the southwestern boundary of the Royal Borough of Kensington and Chelsea, and opposite the site of the old Lots Road Power Station in Chelsea.
 The development consists of luxury apartments, the Chelsea Harbour Marina and the Chelsea Harbour Design Centre and a hotel, 'the Chelsea Harbour Hotel'.
In the 18th century, Chelsea Cricket Club was prominent for a time and played its home matches on what was then Chelsea Common, an area that virtually disappeared under building work in the 19th century.
 Records have survived of five important matches between 1731 and 1789 which either involved the Chelsea club or were played on the common.
 The first, played on the common for the high stake of 50 guineas, was Chelsea v Fulham on Tuesday, 13 July 1731.
 Fulham won.
 There was a return at Parsons Green on Tuesday, 10 August 1731, which Fulham won by 3 runs.
 On Tuesday, 26 June 1733, Fulham again hosted Chelsea at Parsons Green, this time for 30 guineas, but the result of this match is unknown.
 On Monday, 16 August 1736, there was an inter-county match on the common between Middlesex and Surrey.
 The stake was 50 guineas and Middlesex won by 9 runs.
 The last match found in the records was on Thursday, 10 and Friday, 11 September 1789 when Chelsea played Marylebone Cricket Club (MCC) in Marlborough Gardens, Chelsea.
 This match, which was of dubious status, was probably drawn after a postponement.
Chelsea Girls is a 1966 experimental underground film directed by Andy Warhol and Paul Morrissey.
 The film was Warhol's first major commercial success after a long line of avant-garde art films (both feature length and short).
 It was shot at the Hotel Chelsea and other locations in New York City, and follows the lives of several of the young women who live there, and stars many of Warhol's superstars.
 It is presented in a split screen, accompanied by alternating soundtracks attached to each scene and an alternation between black-and-white and color photography.
 The original cut runs at just over three hours long.
Chelsea on the Rocks is a documentary film directed by Abel Ferrara about the Hotel Chelsea.
 It premiered out of competition at the 2008 Cannes Film Festival.
 The film features Ferrara interviewing people who have and had lived at the hotel, intercut with dramatized footage of some famous events that took place there.
 During the film's interviews and docudrama Gaby Hoffmann, Dennis Hopper, Robert Crumb, Adam Goldberg and Bijou Phillips make appearances.
Chelsea Horror Hotel: A Novel is a 2001 novel by Dee Dee Ramone, a member of the punk band The Ramones.
 It was released 13 months before Dee Dee died due to a heroin overdose.
 The book follows Dee Dee as he dictates daily events at the Hotel Chelsea in New York City with his wife Barbra and dog Banfield.
 Dee Dee is convinced that the room he stays in is the same where his old friend Sid Vicious killed his girlfriend, Nancy Spungen.
 Dee Dee is further visited by other dead punks, including Johnny Thunders and Stiv Bators.
Chelsea Walls is a 2001 independent film directed by Ethan Hawke and released by Lions Gate Entertainment.
 It is based on the play "Chelsea Walls" by Nicole Burdette.
 It stars Kris Kristofferson, Uma Thurman, Rosario Dawson, and Robert Sean Leonard among others, with original score by Jeff Tweedy of Wilco.
 The story takes place in the historic Chelsea Hotel in New York City.
Hotel Chelsea is a thriller of 2009.
 The production traveled to New York for filming at the classic Hotel Chelsea, a place regularly visited by celebrities, after which the film was named.

Question: What city does Chelsea Walls and Hotel Chelsea have in common?
Answer: New York City