Ancient yogis were famed for their ability to live in solitude, to exist in peace with nature, and to turn into raccoons whenever they were near a garbage can. Transform yourself into a beacon of stretchy peace with today's Groupon: for $25, you get 10 drop-in classes at Philly Power Yoga near Rittenhouse Square (up to a $115 value). Philly Power Yoga stretches soul sacks of all skill levels with its selection of limb-limbering classes. Skilled instructors guide students through yogic sessions held in a room heated up to 90 degrees, which stretches and stimulates muscles and flushes out tension and any remaining subdermal cannonballs. Keep connective tissues happily bonded with their ligament brethren with a beginner-yoga or power Vinyasa class. Check the class schedule for class times and dates.