mobile application with about 10 million users who "check-in" to area establishments, which are then shared with the user's social network of friends. About 400,000 merchants use Foursquare tools to drive traffic to their stores. "I think that we will hit our inflection point the same way that Twitter did," Crowley said. "I can imagine getting to 100 million users. I can imagine us exceeding that." Foursquare and LivingSocial, the online daily deals site, are part of a new wave of companies that have attracted investors interested in owning a piece of the social media business. The first social media site to test investor appetite and go public was LinkedIn, which made its stunning debut on the New York Stock Exchange on Thursday, defying even the highest of expectations by closing 109 percent above its IPO price at $94.25. On SecondMarket, one of the largest exchanges for private company shares, Foursquare saw the biggest increase in participants interested in the company during the first quarter. LivingSocial made SecondMarket's list as one of the new companies on investors' radar for the same period. MORE THAN DAILY DEALS With about 30 million members worldwide, LivingSocial is still far smaller than the No. 1 player in the market, Groupon, which has about 70 million users and is expected to file for a public offering this year. LivingSocial is on track to generate $1 billion revenue this year. Tim O'Shaughnessy, co-founder and chief executive of LivingSocial, said online advertising companies have approached LivingSocial interested in a takeout. The Washington D.C.-based company just raised $400 million in its latest round which included Amazon.com,ng system installed by the company. Owners Tim Toole and Jim Harden say they are trying to offset the cost of business and admit they will do almost anything to save their business, according to the station. "We'll run a background check and if we approve them, we will give them a shotgun," Harden told myfoxtampabay.com. Toole and Harden are promoting the AC business, as well as their licensed gun shop, Shoot-N-Irons, right now in its early stages. "I'm not in this to make a political statement," Toole said. "I'm not in this to promote the NRA. I'm not in this to do anything, but promote my business." Some have questioned the gun giveaway. "I don't think a shotgun is