Exercise your options. Sample a range of fitness classes at the 92nd Street Y during “Perfect Fit,” a two-day open house with activities like Pilates, aquacise and basketball. For details and to RSVP, visit 92Y.org/perfectfit. 7:15 a.m.-10 p.m. Free. 92 S.

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New York Today: Free and Cheap Events, May 10, 2011