I'm a huge believer in coworking spaces, have actively used and promoted them, and have been a member of - and know people who currently are members at - WeWork.
I had never heard of SPE's, though. That some crafty financial skullduggery, right there.
And a wicked-rickety tower to stand $20bn of valuation on top of!
I still like the Office Nomads model: Own the building. Full disclosure: I was a tenant for several years, and am personal friends with the owners.