Hi, I've been going through all my songs, and I think I found a couple that would work for an after hours bar that Gracie would likely hang out at. It really depends on the exact feel you're going for with your bar, but here are some songs to consider:
K.K. Jazz - Classy and upbeat
K.K. Bossa - Classy and relaxed
K.K. Mambo - Upbeat, still classy
K.K. Milonga - Mysterious (like Rick's Place in Casablanca)
K.K. Groove - Classy and cool
K.K. Moody - Old fashioned and classy
K.K. Disco - Ritzy Disco?
Those are my suggestions. Everything is really subjective. There were a few others I could see working, but everyone has different feelings about music. I tried to avoid songs that I thought weren't classy enough for Gracie. She has standards, y'know.