Walk through the tailgate area at a college football stadium, and beer drinking is as common a sight as fans adorned in jerseys of their favorite players. "Every institution is looking at how they can increase revenue streams, and alcohol is one of those," said Jeff Schemmel, president of the consulting firm College Sports Solutions LLC. According to an Associated Press survey of the 21 beer-selling schools that own and operate their stadiums, about half their concessions revenue is derived from alcohol. According to its contract with concessionaire Sodexo, Troy will receive 43 percent of gross beer sales at its 30,000-seat stadium, or better than $2 for every $5 beer. The Big 12's West Virginia, with a budget of more than $80 million, began beer sales in 2011 in part to counter a problem with drunken fans coming and going from tailgate parties during games. Troy football season ticket holder Brian Ross, who also attends the Trojans' road games, said he sees worse behavior at stadiums where alcohol isn't sold. Selling alcohol at college football games might seem counterintuitive at a time when there is so much concern about binge drinking on campuses. Mothers Against Drunk Driving national president Jan Withers said her organization opposes any alcohol in a college environment because most of the students are under 21.