For online bargains, working together yields deals - USATODAY.com

SAN FRANCISCO — From karaoke to kickball, some things just don't work without a group of people. A start-up wants to add one more to that list: Online bargain hunting.

Groupon, whose name combines "group" and "coupon," offers daily deals on products and services, such as tailored shirts, meals at restaurants and paintball games. There is a catch: A certain number of people in a given city must sign up for the deal to go through...