Maybe the crowd, a crew of mostly sweet-faced, postpubescent hip(hop)sters, had a hard day at college. Maybe the acts’ bourbon-and-coke styles just happened not to coalesce as expected. Maybe it was just one of those Wednesdays. But Troubadour‘s billing last night of DaVinci, The 87 Stick Up Kids, Free the Robots, and Freddie Gibbs with