The SOBs — Seniors On Bikes — run a year-round social ride open to anyone 50 and up, all abilities welcome. No hammer-fest, no dropped riders: this is the kind of group that actually means it when they say social.
Santa Fe's Tuesday route details aren't spelled out on the page, but you're in the high desert at 7,000 feet, so expect some lung-opener regardless of pace. Good company guaranteed.