The third shop I visited in Phila was Loop on South Street. After seeing the shops, I thought they were all much smaller than shops in the Bay Area, but now I wonder...
Some shops here are small, too. I'm not a very good judge of size...Anyway, Loop was clean and bright and full of enticing yarns. The colors really jumped off the shelves. I only picked up some Spud & Chloe Fine and some Louet Gems fingering to make the Matroyska gloves in last year's Knitty.com.
Next door is Loop's sister shop, Spool, which was full of lovely fabrics.