Want to indulge yourself on your birthday for no bucks? You can make your big day a birthday free-for-all. Here are some NYC spots that offer freebies and discounts to birthday girls and boys — just remember your ID! Start the day off on the right foot — or handstand. Integral Yoga Institute of New York (227 W. 13th St.; 212-929-0585) offers a free class (usually $17) for you and a friend on the day of your birthday. This immense, six-story facility has more than 100 classes every week, fit for any level of yogi.
