Well, not San Francisco, but if you ever go to Germany you can rent W113s from the Classic Center in Stuttgart-Fellbach. A 230SL will cost you 460 Euro per day, tax included, or 780 Euro for a weekend. The 280SL is 520 Euro per day, 800 per weekend.
They also rent 190SL, 300SL Roadster, 500SL (R107), 170S Cabriolet B (1949), 220 Cabriolet B (1951), 300d Cabriolet D and 220 SEb Cabriolet (W111). Happy motoring!
Klaus
1969 280 SL