Bueller?

Back in the day, when I had a company expense account, these guys were pretty reliable.
http://www.greattickets.com/buynow/whitesox.htm

But you might need the expense account!

I have heard stories about people who folded a $50 bill to the size of tickets being able to get in at certain places, handing those Origami creations to ticket takers. I have no idea where you would sit, though :-)