Patpong is an entertainment district and a red light district in Bangkok , Thailand . Patpong ( , `` Phatphong '' ) is an entertainment district in Bangkok , Thailand , catering mainly , though not exclusively , to foreign tourists and expatriates . While Patpong is internationally known as a red light district at the heart of Bangkok 's sex industry , it is in fact only one of numerous red-light districts some catering primarily to Thai men and some others , like Patpong , catering primarily to foreigners .