I've been to two saunas in salvador:
1) Sauna Fox, nice neighborhood have a mix of cruising clients and around 15 boys. It had a nice structure and was very clean (as of july 2012) and I liked the boys there - mix of lean capoeira guys and some stronger muscled ones.
2) Planetario 11, not so nice neighborhood, boy only sauna, poor suite, nice bar and clean sauna/showers. had about 10 working boys (week day) mostly muscle guys. Found two habituée from SP there (clients).
One day I found some boys on the "Porto da Barra" beach... there are some beer vendors on the sidewalk with car sounds were few boys stay... I sited on the small wall of the beach drinking a bit but none talked to me thought, they seemed busy with the gringos.
For locomotion, used only taxis and they are somewhat expensive in Salvador. Also, Its safer to ask at the sauna desk for a taxi when you are leaving - one night I got a handsome tall blond guy as taxi driver who was a ex-sauna worker. But I already had other plans for the night