Some days, you gotta dance.  Dance sets us free when there are no words, and sometimes, it’s just the only thing left to do.  When many of us think of yoga, we think of a similar release. Peter Crowley, a local Boston yoga instructor and inspiration, puts these two practices together every Friday night with Freedom Joy Yoga – a class that combines yoga, a house music playlist, a dark room, a disco ball, and some seriously ecstatic dancing.  The Boston Yoga Blog went to Back Bay Yoga Studio this past Friday to give you a first-hand look into the class that has Boston Yogis kicking up their heels: