Not sure if this is a joke or not, but I'm an only child.

I was involved in quite a few organizations for homeschoolers, and the "peers" I refer to were kids I knew from those sorts of things:

• I attended a weekly "co-op" ran by homeschoolers' parents where they'd teach various subjects. The one parent who was fluent in Spanish would teach Spanish. The one who was really passionate about history taught a history class. They'd also purchase frogs to dissect and have 20 kids or whatever dissect frogs (because it's a) not so easy to get formaldehyde-preserved frogs in quantites much less than that and b) a lot of the parents just wouldn't want to have to deal with that because it's icky and were happy to have someone else's parents have to deal with that while still ensuring their kids had the experience and learned what there was to learn from that exercise). Things like that.
• I took a few classes at a local private (Christian -- very Christian) school that allowed homeschoolers to attend just one class here and one class there if they and their parents wanted. (The founder of that school had an affair with a secretary. The two of them kindof disappeared and got married, leaving the school without leadership, after which folks started to realize he was kindof a pathological liar and grifter from the start. Heh.)
• I was in a symphony for homeschoolers for a while. (Played violin.)
• There was also a homeschool chess club that I attended for a while.

There were a few other things that I didn't attend but one or two times. Not enough to really get to know anyone there. And I'm probably forgetting one or two things. But you get the idea.