Delusions of Grandeur seems about right for the name of an artists’ collective showing in a hole in the wall in Brentwood.

Located on the second floor of the Gateway Arts Center, the 39th Street Gallery is a 450-square-foot box that has been known to put on pretty cool little shows, including a recent micro-retrospective of the great D.C. painter Manon Cleary, who died last year. But the National Gallery of Art it is not.