[duality72]

Just an idea off the top of my head: Make it similar to Casino Night events held by charities and at corporate events. Everyone buys in for a certain amount and gets a set of chips. Let the players play ring games (you can set the stakes or let the players choose) until the deadline (3-4 hours later), then whoever has the most chips wins. Players can get up or sit down and choose their games as they like. Expect a lot of all-in bets as the deadline approaches, which might not appeal to your better poker instincts, but may be fine for a social event.