Baby will be dancing with you!! The only thing I'd be wary of is drunk people. I've been in a pub a few times and been holding my hands out in front of me so no one bangs into the bump - I'm very paranoid about it!
The music won't be as loud to bubs as it is to you, just keep yourself hydrated, never leave your drink unattended and if you feel tired go home!!
Apart from that I'm not aware of any issues xx