place to buy theatre tickets at half-price

There's a special booth where you can buy tickets for half-price for certain shows, like Evil Dead The Musical, Spamalot and Dirty Dancing. We paid $35 each for $70 seats, whatta bargain! BUT you must attend the show the day of purchase, and when you make your transaction, you receive vouchers (not tickets) that reserve your seats. Then you exchange these vouchers at the theatre/venue for real tickets.