Shrimpy’s Bar & Grill in Rehoboth has sold out 55 weekends in a row, which the owner credits to singer Bryan Clark performing. Melissa Ferraro is an innate event planner. Credit her tenure as president of Rolling Thunder, a Delaware food truck association. The owner of Outlandish also has Sonora in Newark. But having a bricks-and-mortar location hasn’t changed the need to “put …