Just listened to Sweetheart Schottische and Tulsa Time. Wow, this is certainly not what I would expect for a schottische from my background.

I think since you are playing for seniors and if they are from the north like Wisconsin or Minnesota, it will be what I suggested.

The guy I perform with doing ballroom dancing says sometimes people come from the area's I mentioned and request this type of music. He came from Illinois and had never heard of this type of music before.

Guess you'll have to ask specifically what they want so you don't disappoint them.