Before there was Robin Thicke, there was Bobby Caldwell. A blue-eyed soul singer, Caldwell first blew up in the late 1970s with his hit “What You Won’t Do for Love.” So that Caldwell would get airplay on the African-American dominated R&B radio format, his management took certain steps – such as photographing the artist only in silhouette – to cover up the fact that he was white. Now, Caldwell has been sampled on dozens of rap songs and has released over 15 albums. The latest, 2014’s After Dark, is full of standards and features a 17-piece big band. Make a night of it by arriving early and enjoying the Bethesda Blues & Jazz Supper Club’s classic Continental fare and extensive drink menu.