I'd do some crew battles. Once we start going to tournaments or get tournaments underway, we'll have a good idea of who are competitive players are.
Also, I expect Dan will keep bringing his Brawl+ setup. If people want singles in a specific game, like vBrawl, I recommend having multiple setups of that game. I expect most new people would prefer vBrawl to hacks, too.
Last week we only had two setups for the first 30-60 minutes or so, and there were a surprising number of people that showed up "on time." Just bring setups earlier if you can.