I'll start... (FYI - these are "touch" car washes)
Allston Car Wash
434 Cambridge St
Allston, MA 02134
$8.95 for a basic wash, $2 off with 8 gallon minimum purchase
Waves Car Wash
1680 VFW Parkway
West Roxbury, MA 02132
$7.95 for a basic wash
$29/month for unlimited Extreme washes (1yr commitment)
$35/month for unlimited Extreme washes (no commitment)
<-- what I have
$39/month for unlimited Extreme washes + vacuuming (1yr commitment)
$45/month for unlimited Extreme washes + vacuuming (no commitment)