These are two entirely different visits and mixing them up is the main way people have a bad time here.
Daytime, roughly until late afternoon. A beach bar with food, a deck, live acoustic music and a Gulf view. Families come, children are around, and the atmosphere is closer to a busy waterfront restaurant than a nightclub. This is the version to bring anybody to.
Evening and night. Louder, denser, drinking-led, with multiple stages running at once and a crowd that has come for exactly that. It is not hostile and it is not seedy, but it is an adult room after dark and anyone hoping for a quiet meal should eat somewhere else.
Event weekends. The Mullet Toss in April and the Frank Brown festival in November transform the place and the roads around it. During the toss, Perdido Key Drive backs up for a long way in both directions and parking becomes a genuine problem. If you are staying nearby and not attending, plan your week around the dates rather than through them.
The venue's own annual calendar runs from a Polar Bear Dip on New Year's Day through spring runs and cook-offs to the November festival, so there is nearly always something on. Individual events get cancelled or moved, so check the venue's calendar rather than a third-party listing.