definately do the table thing! i also love what you and you friend were thinking with the tent. i think that the perfect corner for that. try some other idea though. maybe something along the lines of a pagoda or just install a window bench with some curtains infront of it. check out this picture ( http://www.minima.us/outdoor/modulo_tergola.html) i love the clean line of the pull down curtains. you could use thos bamboo blinds that cost $8 each at world market. good luck!

I would get the low table (hack off legs if needed) and set up a creative workspace.

I really like the low table idea.  Scour the local thrift shops and craigslist for full size dining tables in simple rectangular design.  You can chop off the legs and paint (customize) the thing to your liking.  Decorative molding might be nice too.  But yeah, low table, some nice cushions, rolling storage for supplies in ottomans?  It's a nice space.