We dined at Club O many times during our last stay. We were staying at Alamanda. We would walk down before dark. After dinner and a few drinks the staff would callus a cab. It cost $10 for the drive back to the hotel. No one we have talked to recommend walking the beach at night.
The staff and guests of club O never had any issues with us not being guests of the resort. All we very friendly.
One night as we were getting our first drink at the bar, a very nice man started a conversation with us and invited us to join his group for dinner.