There are plenty of shows in the evening and you can get a listing of them once you get to Eureka Springs. I am not a country music fan so my wife and I went to a magician's show at a theater near our hotel. The lobby of our hotel had brochures from all the local activities to help us decide how to spend our evening.
while in Eureka springs visit the lumberyard saloon
Its newly built, and they have bands in there on the weekends
Dress Code: where anything u like