At one of the buildings I pass on my commute there are several bikes that are "usual suspects" at the rack out front. About 6 total, with 4 in attendance at any given time. They obviously work a different schedule than I do, because only once have I actually seen one of them actually riding. The rest are just there or not there. The one time I saw the guy I was so excited, because so rarely do I see another cyclist. It made me smile as he did a couple of happy zig-zags on the open road before setting off at top speed. Someone as happy as I am to be biking home, reveling in the freedom (for a while) from work.

Other than that, I've seen two regulars (wave "hi", but don't actually know), and I've shamed some people into riding in with me a couple of times.