dancers & musicians--Help?

[R o W]

i spend lots of time volunteering at a small museum which is actually a
jail built in 1911.    they need some background music & i know NOTHING
about that period.  is there any relaxed type dance music? Lively is fine
but not loud or 'irritating' to a modern ear.   Victorian is too early,
right?  or did it extend into 1911?   roaring '20s type is right out.    
does anyone have a tape of suitable music?  where can i get such a thing?
   thanx y'all                   sir robert