Yesterday we caught wind that Christopher Mintz-Plasse, the actor who played McLovin in Superbad, was at Diner on Friday night. Naturally, we wondered whether he had attempted to procure an adult beverage. And who better to tell us than Michael Rankin, who has been a waiter at the converted twenties railcar for three out of the nine years it’s been serving up slow-cooked American food? Rankin had plenty to say on the celebrity front (Bono biting a bartender?) and the foodie front — including a convincing reason the humble establishment might overtake its neighbor Luger in steak supremacy.