This Sunday, Sept. 19, Sacred Well Yoga Studio (450 W. Broad St., Suites 319-320, Falls Church) will be holding free yoga classes every hour on the hour starting at 1 p.m. in celebration of National Yoga Month. A full offering of classes can be seen in detail at swys.net. Though classes are free, those interested must pre-register by emailing swyoga@gmail.com or calling 703-989-8316.