Though I've never used it, Loosecubes (http://loosecubes.com http://loosecubes.com) is doing just this. Offices list their spare space (on a daily or monthly ba

Though I've never used it, Loosecubes (http://loosecubes.com http://loosecubes.com) is doing just this. Offices list their spare space (on a daily or monthly basis, for a fee or for free) and the types of people they're looking to work with, and people seeking office space can apply for those spots.