Ask HN: Help me brainstorm ideas for an Open Access Workshop

I've seen several brick and mortar places like http://www.clubworkshop.com/ where you pay for a monthly membership to have access to tools and facilities to work on your DIY projects. I'd love to learn more about these types of businesses and perhaps open one up in the Midwest area (Milwaukee/Minneapolis corridor maybe?).

Have any of you guys visited a place like this? What was your experience? How busy was it? What types of people used it? Do you get the feeling that the cost is too steep for a DIYer?

Any insight at all from "great idea!" to "stupid idea! you missed..." would be interesting for me to hear.

Thanks!