Just spent some time at Moomba in July and there are different events each night including a BBQ night, party night, wet t shirt night, etc. We're at the Marriott Surf Club Oceanfront and we sort of face Moomba and could hear the music most nights so definitely things going on there.
Food is ok, drinks are good, although not cheap, service was fine and we actually became friendly with one of the waitresses,and music and dancing are good. I have not been there in November but it was busy in July. Definitely a 20's crowd and a lot of locals and a favorite among the Dutch since it's owner is Dutch.