So my new job needs me to meet with many hackerspace/makerspace organizers in my area. You'd think they'd all be up on OSM, right? Nope.
Most of the leisure=hackerspace entries in Canada are wildly out of date. Quite a few had shut down, and many new ones haven't been added.
While we can't exactly import directly from HackerspaceWiki, it's a good place to start. Sure, it's out of date in places, but at least it gives you names and websites to research near you. If the space is still active, it's probably got a few recent Twitter mentions or an active blog.
The new job? Thought you'd never ask. It's the regional organizer for Makers Making Change. We use makerspace technology to get open-source assistive technologies to people with disabilities who need them.