Anyone who’s attended a college football or NFL game knows that the real party starts outside the stadium. Hours before kickoff, fans flood parking lots armed with coolers, portable grills, and bluetooth speakers to bask in the crisp autumnal weather, fill their bellies with burgers and beer, and mingle with fellow tailgaters. Some attendees might not even go to the game. They go for the food, drinks, and, above all, the camaraderie. But while the practice is inextricably tied to American f...