Groupon is something that some of you may get use out of. Especially if you live in Los Angeles or Chicago.
Groupon.com is a place that basically gets a deal with some local establishment, whether sports tickets, food, memberships, or anything else. The deal is that "If we give you at least 300 (or whatever number) how much of a deal can you give my group of people?" So then you buy a voucher (groupon) for it. You then take it to the place and they give it whatever it is that the deal is about.
Like in Chicago you can get 64% off a 1 year membership to the Art Institute of Chicago. That means you just pay $40. That's a good deal. Looks like they needed 300 people to buy the voucher for the deal to work. Looks like right now they have over 4,000 people that have bought it.