Performance Health & Fitness at 301 Jaffrey Rd. in Peterborough will be hosting a free Yogathon on Sat., March 31, from 10 am to 4 pm. All classes, including massage sessions, are offered at no cost to the participants. Rosemary Weidner of Dublin will be teaching her class from 1-2 pm. Donations of food or cash will be accepted to benefit the Peterborough Food Pantry.