If you want to sweat profusely, wait for hours, & be annoyed by idiotic game-playing by a jackass emcee, then by all means, go hang-out at the Hangout.
I went several times in July at night time with jeans and a tucked in shirt, and never broke a sweat. As far as waiting, we walked straight to the bar, and within 5 minutes we all had drinks. It never took long to get drinks. During the busiest days of summer there probably is a wait to get a table, but tourist season is pretty much over. I doubt it'll be packed Saturday.