| Simplicity in your playing and a medium tone, too emulating an upright if their looking for originality. Lots of spacing and the vocals need to be "first" over everything. Most oldies singers are not interested in hearing and feeling the Bass, rather the piano for their accompaniment. Tons of C/Am/F/G and the transpose. You may find yourself in horn keys also if again they are looking for that original sound. An oldies gig that features great vocals is a fun gig, I started back in the late fifties opening as a kids act, to the older teens band, to a regional pro band that opened for groups like the Exciters, Flamingos, Cadillacs etc. it was a great experience and taught me that the show element was one thing people understand and most of the time the musicianship will be overlooked unless your performing in a club or area that has knowledge of music. .........the Flamingos were incredible, still the best vocals I've ever heard!!!! Good luck. Doc | 
