Police told local news that no official complaints about the incident were made.
A photo of a man performing oral sex on a woman on stage at a Dead Kennedys concert on Thursday has gone viral.
While the band were playing, a woman was seen laying undressed on the stage while a man appeared to be giving her oral sex.
However, they added that the incident "could be a violation of the business and professions code".
Security at the concert reportedly put the sex act to an end. In a statement, the Belly Up Tavern said: "Of course we don't condone this activity in our establishment and security stopped it right away. This is certainly a first for us."
But commenters online who claim to have attended the gig say the couple only stopped the act "when people stopped paying attention to them".
