Harvard-Radcliffe Ballroom Dance Club. The basics of four Latin dances. Currier Fishbowl. Beg: W 7:50-8:50 p.m. All levels.

Pilates

Boston Ballet Studios. Because Madonna has maybe done it. Bring a mat. Tu, Th 9-10 a.m.

Swing

The Dance Complex. Because it don't mean a thing... Su 1:30-3 p.m. All levels.

Yoga

Green Street Studios. Lyengar-style (emphasizes alignment, strength, and flexibility). Sa 4:30-6 p.m.

MAC Recreation Rooms. You want your own mat. M-F, most sections between 12 and 2 p.m. Call for specifics.

Note that certain classes require advance registration and are always liable to change, so calling ahead is wise. Partners are optional.

Green Street Studios. 185 Green St., Central Square. 864-3191. $10-12.

The Dance Complex 536 Mass. Ave. 547-9363. $8-12. http://cambridge.zami.com/dancecomplex.

Harvard-Radcliffe Ballroom Dance Club. Classes started Feb 23 and run for about four weeks. $20. http://www.hcs.harvard.edu/~hrbdc.

Malkin Athletic Center (MAC). Classes started Feb 10. 495-2219. Aerobics info: 495-8683. FREE (yoga $5).

Radcliffe Dance Program, Agassiz House, Radcliffe Yard. Register ASAP at the Dance Office in the basement of Agassiz House. M-F 1-5 p.m. $45-80.