Here’s a deal for you fitness fanatics. Â TheÂ Integral Yoga Institute of New York City will give you and a friend a free yoga class on your birthday. Â This freebie is offered only on your birthday, so you must bring an ID. Â If the yoga studio is closed that day, you can redeem either the day before or after. The institute is located on 13th Street between 7th and 8th Ave.