It depends on the custoemr I have coming & the service I'm performing. When its anything Spa, then I play clasical, usually, Pachebel by Cannon or Mozarts 21st Piano Concerto. Some times a little Schubert.
If its extensions then normally, Ella Fitzgerald, some Nina Simone(haveto becareful which, as some of hers is a bit mordid) or Dinah Washington. Frankie Sinatra & Deano are always sure fire hits with my customers.
I always find that whatever the age of my clients, light Jazz is always appraicated & everybody knows most of the tunes!!