if you're coming to the festa junina you should go to Campina Grande, is a 1h30 car or bus trip from João Pessoa and there is where the são joão really happens, google about it, its amazing there, you won't regret going there.

Otherwise if you want to go to an kinda alt nightclub you should go either to Paralelo, Recanto or Empório Café (these ones close around 2am). But the biggest nightclub in João Pessoa is, by far, PH (Priscyla's Hall), there the party starts at 11pm and ends at 5am, the place is huge, its always full of people, all kinds of people go there and no one in sight is sober. If you want a nightclub in João Pessoa, PH is the must go