While we are being laid back, why not consider a Karaoke Rehearsal Dinner? It can even be a "after party" after the rehearsal dinner.
I know Karaoke has gotten a bad reputation, but in a large group of friends it can be alot of fun, and really a nice stress reliever!
So when you are thinking of things to do for your dinner or after, just remember, as long as you are having fun, putting your own spin on your day - then it doesn't matter what you doing! Just have fun with the ones you love!