Soi Pratuchai
Soi Pratuchai (alias: "Soi Twilight"; ,  meaning "Triumphal arch soi") was walkway ("soi") in the Bangrak district of Bangkok, Thailand known for being a gay-related entertainment district, catering mainly, though not exclusively, to foreign tourists and expatriates. While Soi Pratuchai was internationally known as a red light district for gays at the heart of Bangkok's sex industry, the city in fact has numerous gay-related red-light districts that are far more popular with Thai. Soi Pratuchai was closed since 1 April 2019 with its land plots being bought. Some bars has relocated in the vicinity of Patpong, while others have closed down permanently. The site of Soi Pratuchai has since been occupied by Chula Culture, a 32-storied condominium developed by  set to complete in 2025. Location and layout 
Soi Pratuchai consisted of a "7"-shaped walkway running between Surawong Road and Rama IV Road. Soi Pratuchai is within walking distance from the BTS Skytrain Silom Line's Sala Daeng Station, and MRT Blue Line's Si Lom Station. It was a dead-ended alleyway and thus less car traffic in comparison to other gay districts in broader Patpong. Establishments in Soi Pratuchai were mostly gay bars, restaurants, cafés and salons. Among them were: Hot Male Bar, Banana Bar, X-Boys Bar, Maxis Restaurant, Dream Boy Bar, Fresh Beach Boyz Bar, X size Bar, and Classic Boys Club
where synchronized swimming shows were available

History 
According to Oat Montien, a former artist-in-residence at Patpong Museum where history of sex tourism around Patpong area is studied, Soi Pratuchai began its name as a gay destination from a gay go-go bar named Twilight; later the soi's alias, that relocated from Sukhumwit area to the entrance of Soi Pratuchai in 1971. The bar was first mentioned in 1966 as a "gay" establishment - being one of the first instances of the term gay being referred to distinguishably from transwoman term kathoey. The bar was said to initially have no seat, all patrons must stand to be Twilight shake-hand-ed (referring to having their genitals being handheld) by the bar's hosts. As of 1990s, 20 years since Twilight moved to Soi Pratuchai, the entirety of establishments in the alleyway became gay bars. As of 2019, there were more than 10 gay bars. In 2019, every land plots in the alleyway were sold. The reason behind the purchasing remains unknown. Soi Pratuchai's legacy of gay tourism suddenly came to an end, worsened by the COVID-19 pandemic in Thailand. The broader Patpong area, during the pandemic's peak, only three gay bars remained. Sex-related businesses 
Most Soi Pratuchai go-go bars feature boys dancing on a stage. The dancers (and even occasionally the serving staff) are generally available to customers willing to pay a bar fine to take them out of the bar; the fees for sexual services are negotiated separately. Some establishments advertising "massages" are in fact disguised brothels, and a few famous "blowjob bars" offer oral sex at the main bar or in back rooms. Several upstairs bars still feature (technically illegal) sex shows, with boys performing various creative acts. Perhaps the most notorious of these features boys performing exotic feats involving bathing. Some of these second-floor gay bars are run by scam artists who lure tourists with offers of low prices and later present a wildly inflated bill along with a threat of physical harm should the bill go unpaid. The Tourist Police, usually stationed at Patpong 1 and Silom Road, can help in these situations. Some establishments in Patpong employ kathoeys (or "ladyboys") either exclusively or as part of a mixed gender staff. The bars open at 6 pm and close at 2 am. See also 
 Prostitution in Thailand
LGBT in Thailand

Sources

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Neighbourhoods of Bangkok
Tourist attractions in Bangkok
Red-light districts in Thailand
Bang Rak district
Gay villages in Thailand