If you happen to run into Mitch Altman and he gives you a Hackerspace Passport, or if you make your own like I did, you should toss it in your bag and bring it to BarCampMilwaukee6, as I’ll have a nice #BCMKE logo to stamp in it.
BarCampMilwaukee is an event, but I also like to think of it as a “temporary Hackerspace” of sorts, since it does it exist for roughly 2 days per year, and has done so since 2006.