I haven't done yoga in a while, but I'd be up for it. It'd be good for me! Saturday is also a possibility. I was considering doing yard work, but it's gonna be hotter than hades.
OK, it seems like it is you and me for yoga and free beer at Columbus Square on Thursday, and possibly another meetup with BC_Goldman as well on Saturday.
This is what I am interested in on Saturday:
First Bank of the United States, free 9am-5pm
On The Delaware Music Festival 10am-8pm, free
Philadelphia History Museum, free 10:30am-4:30pm
Philly Ice Cream Scoop @ Reading Terminal Market 11am-5pm
U.S Army Band music and fireworks show @ Penn's Landing, 8pm show, 9:30pm fireworks
Probably the best meetup place for Saturday is the US Army Band music and fireworks show. I'll probably be running around the city during the day hitting all of the other free stuff without a set schedule.