Pins Mechanical has so many things to do, I can't list them all. Duckpin bowling is the centerpiece (but you better call ahead to get a reservation!). There is also patio pong, ping pong, hooke (a fun game I have never seen anywhere else), bocce, and foosball! Other than duckpin bowling, you don't need a reservation, so feel free to walk in (it is directly across the street from the Hyatt House).
Hofbrauhaus is literally right next to the Hyatt hotel. It has amazing food and beer with a beautiful view of the city over the river. Plenty of seating for large groups, both inside and out, often having at least one live music performance.
Carson Street is the main drag of Pittsburgh's Southside. Bars, restaurants and even escape rooms line the street for twenty blocks. Less than two blocks from both the Hyatt hotel and the venue, Carson Street will provide you plenty of things to do before things kick off at 7.