“That was today?” You need last minute dinner plans so you call every hot restaurant in town. As hostesses laugh through each reservation rejection, you realize there has to be another way. The NoWait app, created in Pittsburgh in 2010, was designed to allow users to queue in line for participating restaurants that don’t offer reservations—and even for a few that do. The app has since increased its hostile takeover of frisbee-sized pocket buzzers and hoarse-throated hostesses