As Babsy and DisneyWishes14 posted, all of the deluxe resorts (except WL and AKL) accommodate 5 in a regular room. With that said, the rooms at CR/Poly/GF (and I think all but 1 or 2 rooms at BWI) come with a daybed, with only some rooms at BC/YC having a daybed. Parties of 5 are given preference for those rooms, but if one isn't available they will provide a rollaway. Also, the monorail resort rooms are quite a bit larger than the Epcot resort rooms.
Some of the deluxe resorts have deluxe rooms that are larger than a standard room, but they do cost more.