Fans of group fitness, mark your calendars: The SELF Magazine Workout in the Park is coming to the San Francisco for the first time on April 30. It's a day of crunching, yoga-ing, cardio-ing and general self-invigoration at Marina Green, led by the fitness gurus over at CRUNCH gym. (Gleeks, get excited: there's a class dedicated to learning the songs and dances of Glee). Celebrity host Alison Sweeney of The Biggest Loser (soap aficionados will know her as Sami from Days of Our Lives) will be on deck to pump up the crowd.

And starting today at 2, San Francisco Gilt City members can purchase tickets for $20, which will include a year-long subscription for SELF and a one-week complimentary membership to CRUNCH. Tickets to the event will be available to all consumers beginning March 15.