About twelve minutes over the Ravenel outside rush hour. The bridge is the only variable — it moves well most of the day.
Yes, directly outside the studio on S. Shelmore Blvd. No meter and no app. It is one of the most common things people mention after their first visit.
Weekday classes start from 7:00am and run to 7:00pm, so an early class and a drive back over the bridge is very doable. Check the live schedule for the current times.