I live in a suburb of Dallas, TX... so our most prolific and famous gas station/convenience stores are 7-Eleven. I really don't know how far the reach of 7-Eleven extends, but they're fucking everywhere here. Some nights, I want a Coca-Cola Slurpee like a fucking pregnant woman wants ice cream. So if I go to the first one, and the Slurpee machine is in defrost, no worries. There's at least 4 more locations within a 5 minute drive of my home.
Some fair warning though. Never, NEVER EEEEEEEVER eat the hot dogs there. They're at least a month old, and they just roll around on this metal roller-thingy and sweat constantly. Also the nachos suck too, and the cheese looks like something that leaked from a nuclear reactor.