The Beach Club does have handicap accessible rooms with roll in showers. We were in one of them. It was conveniently located on the ground floor, just a few doors down from the marketplace.
According to Touring Plans, BC has six rooms with roll-in showers. One is a two bedroom suite with club level access. The other five are two queen beds with day bed and two of those are also club level. I have stayed in one of the ones on the club level floor and it had a great view of the water and was convenient to the club.