Yoga Flow SF

If the Marina is known as the land of Lululemon, this sunny, family-run studio is its church. The pristine, two-room space on the second floor of the Clock Tower building is swathed in floor-to-ceiling glass. The 60-, 75-, and 90-minute vinyasa flow classes are challenging and fast-paced, designed to make you sweat. Around 20 teachers work out of the Union Street studio; another 20 oversee classes at Yoga Flow’s second location in Ingleside Terrace. (Book a class with Union Street favorite Tom Lee—and arrive early to snag a spot.)