I think there is a pilates studio. also they might have classes at the old "happy-body gym" i think its called "techno gym" now. also at the primadonna fitness

check out these links

http://www.primadonnafitness.ch/top.html
http://www.atlantidesport.ch/contenuto13.asp
http://www.css.ch/it/pri-ges-sem-introduzione_pilates