One of the many rehearsal spaces at Music City San Francisco. Courtesy. Following a $20-million revamp, Music City San Francisco has opened and is offering free time at its rehearsal rooms through Friday, Jan. 19. The “Star Factory,” a 29,000-square-foot space at 1353 Bush St. in downtown San Francisco,…

SAN FRANCISCO — I think I might have overdosed my 13-year-old daughter. On music. C’mon. Rendering: Adam Pardee/STAFF. She wouldn’t be the first of my daughters to suffer at the hands of my geekery. My 19-year-old was force-fed punk rock until she started making plans to perform a Bad…