David Dachtera while I don't operate one of these, there are several flex space offerings here in Charleston. Besides the local Chamber offering a free work space, they also offer conference rooms and catering at reasonable daily rates.
As part of their package, if you have an active Chamber membership, you're able to use the working space (some tables, chairs, lounge area with projection TV, coffee and soda refreshments. There are no computers but I think there is printer copier available.
Some of the other spaces I have seen around town charge by the hour and another does monthly rates. Those offer private "offices", or cubicles to work from and some personal support from business consultants and experienced startup teams focused on raising money.
Personally, I like the idea of charging a flat membership fee monthly, allowing some free use of the space, and charging for more advanced services like catering, private conference rooms, consulting, tax and accounting etc. If you were savvy about it, you could provide remote office workers and startups all the resources they would need to get off the ground at what would feel like very low rates.
The membership is also good because by nature, people like to feel apart of something rather than simply paying rent.
Good luck!
Ryan