Jump Man Jump: Nevada's Indoor Inflatable Party & Play Zone has an interesting special discount:

For the month of May 2008, we'll give you a $20 discount off of our 2-hour weekend party if you are Catholic. Offer good for the month of May 2008 only for Catholics when you book a party for any future month. All you'll need to do is pray a Hail Mary with the person you book the party with!

I wonder when atheist month is coming. (Yes, this probably violates state and/or federal laws.)

Update: They must've realized the problem, since the discount is no longer on the site.