This is a helpful list of resources for dancers.  I am not affiliated with any of these companies in any way.  

Dance Socks:  If you like wearing sneakers to class but would like more give on turns to protect knees and joints, these might be helpful.  

Cowboy Boots - Go West, Sheplers

Hats and Accessories - Country Shine

Sore Muscles - I find this homeopathic remedy extremely helpful to keep around for sore muscles. 

Long Island Country Music Association 

Dance Floor Etiquette

Dance Floor Etiquette