 Happening bars and couple kissas skirt around Japanese prostitution laws by neither providing nor promising actual sex on premises, instead stressing that what may or may not happen is entirely up to customers.In a high-profile incident in 2004, after porn star and wrestler Chocoball Mukai advertised on his website that he would be performing, the happening bar "Rock" in Tokyo's Roppongi district was raided by police.Chocoball, who had been caught in the act with another porn star, was later convicted for public indecency and sentenced to a five-month jail term, and the club was forced to shut down.