As a car-free cyclist it's pretty much a solo venture for me. Once in a while I'll meet someone when out riding trails(rarely)and hang for a few miles or stop for a lunch or something.
I've done the roadie/pace line bit, but found the general mentality regarding cycling a little too narrow for my taste. Learned A TON, though so I AM appreciative for having had that kind of intensive training.
I own 4 bikes. A tourer, fixed gear, long and short distance utility. The LDU has 700 wheels. It's an upgraded bikesdirect Motobacane. The SDU is a early 90s hard tail/fork mtb. Perfect round town bike. Use it w/a trailer for groceries or laundry. They both have racks/panniers, too. Haveing options is a real blessing. For recreation the fixed is the best. Great workout on moderate terrain. I ride year around, so I'm pretty hardcore. Plenty of winter/foul weather gear. Most of my time is spent doing errands, shopping, visiting friends, etc. They have trouble comprehending bicycle as transportation as opposed to toy. Theybdon'tvget it. Never will. Fine bybme.