There are like 2 parks within a few blocks of there that would make nice meetup places, too.
The 17th works for me, what parks were you thinking of? I could bring a soccer ball if anyone wants to kick it around.
... they aren't the kind of parks with grass. They are more 'park' as in a public meeting space with a few benches. Hing Hay park or Children's international are both right there.
Occidental park is close, too, but his area is pretty sketchy at night so I'd stay clear of it this late in the day (heck, I've gotten harassed there at 8 am in the morning, too).
I stumbled on the waterfall garden park by accident once, it is pretty cool too, but its really close to Pioneer Square/Occidental so I wouldn't recommend it after dark.
Just thoughts, btw, we can still do starbucks. But I think having a frugal people meeting at the bastion of stupid spending is a little strange ;)