I'm more familiar with the Epcot resorts but I'll give it a try for the others as well.
GF - There are benches located all throughout the grounds outside and the lobby is real nice.
Poly - the lobby isn't bad and there is seating at the QS location.
CR - can't help you there, I'm not fond of the resort and try to spend as little time there as I can.
WL - Again the lobby has a lot of little seating areas, there is a nice little outside lounge/QS/Bar that look over the lake
BW - There are plenty of seating areas around the Boardwalk, there are a couple of really nice little outside seating areas under porches throughout.
BC - Plenty of benches outside and the lobby area is cute.
YC - Again benches outside and there is a great solarium near the gift shop.
Swan/Dolphin - their entire pool area is open to anyone and there is a great outdoor bar/restaurant for relaxing at Dolphin. The lobby area at Dolphin has plenty of places to sit and there are lots of little hidey holes near the lobby at the Swan.
POR - there are cut little gazebos located all throughout the mansion side of the resort, not sure about the other side.
CSR - Again lots of benches around the lake and in the little courtyards of each section.
CBR - beaches with hammocks and benches around the lake.
The lobbies in the moderates and values aren't really quiet enough to sit around and relax in but all the grounds have benches throughout.