If you're looking for a fun way to burn some calories, you should try Zumba. 

There's a free class tonight, and every Monday at 6:45 p.m. at Christ Community Church Gym, 7801 E. Kenyon Drive. 

There is another free Zumba class at 10 a.m. every Thursday at Bookmans Ina, 3733 W. Ina Road.

If yoga is more your style, there's a free yoga class at Sam Lena - South Tucson Branch Library, 1607 S. Sixth Ave., at 9 a.m. Wednesday and Friday.