I’m gonna give you different directions than others have if you decide to take the boat. Walk up the boat dock to the yacht club. Don’t go into the building, but take the walkway on the right, which goes right in front of & along the building. Just keep going & you will walk right up to Beaches & Cream. Do not go along the walk way in front of the pool or you will have to go all the way back to the beach club lobby which will end up taking you past B & C. If you’re not staying at Y & B you can’t cut thru the pool, so you’ll have to all the way back to the Beach Club lobby & backtrack to B & C.
Also, B & C is not actually in the Beach Club. It is in a shared walkway between Y & B. I’ve stayed at YC probably 30 times over 25 years. Trust me, walkway directly in front of YC, you’ll walk directly up to B & C.