??SAN FRANCISCO (AP) -- Bargain hunting. It just isn't for individuals, anymore. You've heard of coupons -- now, there's a site called "Groupon" -- that offers ways to make online bargains available to groups of people seeking deals. The site lets users visit the home page and click on a deal for the day. If enough people buy in on the discounted deal, it goes through. If there aren't users are encouraged to sign others up for it. The service is available in Chicago and San Francisco and about a dozen other cities.