The area I live in does have a lot of youth stuff, but most to the stuff is for ages 8-13 or so. Now that I've started college (I'm 16, not going fulltime) I meet tons of people.
I don't know if you know about these, but in many ares they have homeschool e-mail loops where any person can post about a trip to the museum or a park day or something so you can meet up woth other homeschoolers. You might be able to find one in your area.
Lark