A seminar on the different games might be fun. Most people are intimidated by the casino games and a good explanation by the casino staff might be just the ticket.

One of the croupiers could meet with our group and give instructions on how to play roulette, craps (my favorite) or bacarat. The best time to do this would be in the morning that way there are more vacant tables available in the casino.

I think the casino would be very receptive to this, because after the seminar the participants might want to try their luck!