This season’s answer to the food truck is the cocktail truck: a shiny Airstream trailer, classic flatbed or funky VW bus retrofitted into a fully functioning bar. Nancy Barger, of Barger’s Beer Truck in Knoxville, TN, helms a fleet of six that have pulled up to birthday parties, corporate events and baby showers. One was even hired out to surprise a groom at his wedding reception. “He did a cartwheel when he saw us,” she says. And who wouldn’t, to score a jalapeño-spiked margarita (Austin’s Silvercloud) or a cucumber-blueberry Moscow mule (Oregon’s Swig Rig, above) anywhere a truck can park. Pricing varies, but can start at $500 (for the vehicle; you supply the booze and bartenders) and climb to a few thousand for the fully catered experience, everything you need for a movable bash.