Thursday night is the time to be at the Walker Art Center, when admission is free and Gather, the museum's dynamic restaurant, turns into the people-watching-est show in the 612. It's especially fun on the first Thursday of the month, when chef Josh Brown opens up his kitchen to a guest chef (past visitors include Alex Roberts of Restaurant Alma, Isaac Becker of 112 Eatery and Russell Klein of Meritage) who adds a few small plates to the menu and gives diners a first (and free) taste