As others have pointed out, there are studios throughout the Boulder Ridge resort, but most of them are lock-off. One tip if balcony is important, villa 4533 is a lock-off studio with no balcony. It is the only villa at Boulder Ridge with no balcony.
And there are only a couple of lock-off studios on the 5th floor. Other than that, they are sprinkled throughout the resort, though the dedicated studios are at each end of the "long" hallway plus a handful in the hallway behind the elevators on the 1st floor.