Michellek45,
It's right there on the New World Stages website. They give you an email address, and tell you to pick the show (or shows) you want and three dates that work for you. I would have preferred for this to be on a Friday, since I work during the week. Since I have very open availability when it comes to that, I just opened up the calendar on my computer and picked three random dates. I didn't think that I was going to get anything, nor did I think that I was going to hear back from them at all. Granted I was surprised when they got back to me as fast as they did.
But, it sounds like it was an enjoyable experience and I don't think that it sounds like I should complain for getting to see Rent and Avenue Q for free ( and a week after one another.)
"If you try to shag my husband while I am still alive, I will shove the art of motorcycle maintenance up your rancid little Cu**. That's a good dear"
Tom Stoppard's Rock N Roll