Similar spots to Kabuki Springs in the East Bay?

Hi All,

I have been going to the communal baths at Kabuki Springs for ages upon ages and I love it, but the drive from the East Bay into the city and back again has been really negating some of the relaxing benefits of the experience.  I tried to find something similar in the East Bay on Yelp, but had no luck.  Any recommendations that aren't super fancy/expensive? I'm looking for a chill environment that's clothing optional and women only.  Some places that haven't worked for me are The Claremont (too fancy/expensive) and Piedmont Springs (don't want chlorine).

Thank you!