Freeunion
A Freeunion is a Reunion, Similar to a family Reunion, where instead of anybody being invited the event is public and anyone can join.
I went to a freeunion last night, didnt know anyone though, but it is a freeunion
10-year freeunion
The event you plan to attend (with the high school friends with whom you cared enough to keep in touch) INSTEAD of the grossly overpriced 10-year high school reunion.
They want $80 per person? forget that... Send a MySpace invite and let's have a 10-year freeunion instead!