Dunno about Seattle...
...But out here in northern Illinois, there are a bunch of Jaycees chapters. The one I joined up with while single had a disproportionately large number of people my age, most of whom were single (by virtue of the fact that most married people don't have time for volunteer organizations...)
-YendorMike
"They that can give up essential liberty to obtain a little temporary safety deserve neither liberty nor safety."
- Benjamin Franklin, 1759 Historical Review of Pennsylvania