I think this might be the same car wash I just posted. It looks like the same car anyway (and it was in the same group of slides)
Los Angeles, 1960s
http://4.bp.blogspot.com/-OPPRYmdlX1...60s%2B(12).jpg
for comparison
The men's jumpsuits look the same too, white with red trim. (see detail below)
I didn't notice that little orange car until I lightened the photo. -it looks cute.