I played in one Live Action role playing game when I first came to DC.
Being a noob, I was assigned a rather minor role. My primary task was to host a charity auction. Towards that end, I was given the ability cast
geas once per hour.
So I made the best of it. My standard geas was:
You will do your best to make sure your three closest friends attend the charity auction on Sunday.
6 Hours on Friday, 12 Hours on Saturday and 5 hours on Sunday.
I also visited the dealers room (in character) and requested donations for the auction. I actually had about a dozen real items to auction off.
By the time Sunday rolled around the "Auction" (which was planned as a minor sub plot) was the talk of the town. Pretty much
everyone in the game arrived in the
very small room they had reserved.
It would have been one hell of an event except for a little hitch in the plan. Someone planted a rather powerful bomb in my podium which put a sudden end to the Auction, myself and about half the people in the room.