Calfzilla should have brought a couple of six packs and joined the party. I'm sure there were a few desperate MILF/cougars lurking around at little kid's party time. Always are. Actually white wine works better than beer.
Most commercial gym's hold "events" to boost up, or hold onto, membership. Want to draw in more paying customers to sign up. Going to a sports or lifting gym, usually never. Owning a gym today is a very risky venture. Juice bars, candy/snack machines all help to pay the overhead. Maybe a cigar room some day, who knows.