ON & OFF CAMPUS — With piles of multicolored grandma sweaters, hippie jewelry and craft books cluttering the candlelit corners, it’s easy to see why people feel at home in South Park’s Grove Bookstore. But on the first Friday of every month, the Grove morphs from cozy hideaway to full-blown arena, teeming with authors of all shapes and voices. Here, budding novelists (or enthusiastic bookworms) are challenged to test their brawn in the Dimestories competition, which offers an open mic to all those with enough chutzpah — so long as they can tell their story within the strict three-minute time slot. Despite loads of raffle prizes (which include mugs, scrapbooks and a venerated parrot statue), there are no winners or losers — although NPR occasionally plucks a few for national broadcast. And fortunately for campus crawlers without wheels, Dimestories now stops by our own Loft performance lounge every so often. Whether you’re hungry for some literary show or crave a real audience (or just a tasty wine-and-cheese plate), everyone gets their three minutes of fame under these nurturing lights.