In terms of decor,vibe, and music, the Firehouse has all the cheesy Pittsburgh clubs beat. A downtempo night? In Pittsburgh? Great staff and great DJs. The crowd is normally diverse and international. Great place to meet new, interesting people.
Still, I'd say to watch out for Sats around midnight when a disproportionate number of bros and hos hit the scene ruining the crowd much like rotten apples.
Hit this place up early while it's still chill and intimate.