Hey Rob,
I am the one that provided Melody the info as I had heard it before and noticed a sign on my walk last week, therefore it prompted me to inform her. If I remember correct it was on the right hand side of the entrance to Sandy Haven from the road side, not the beach. It was a wooden sign attached to a pole.

As far as "When any business establishment sells both food and drinks, it is more often than not proper to purchase the food and drink at that property." Really? What is so improper about using the provided fridge in most hotels to store and consume your offsite purchases? I have only stayed in 3 places in Negril, all of which had fridges, and all of which had other guest using them for their outside purchases. It's not a matter of proper for the hotel, it's a matter of revenue.