A few years ago we had sailors from an American ship and a British ship in Portsmouth at the same time. In course of conversation it emerged that English ships allow liquor aboard .. in Officers Mess, Chief's Mess etc. None on US ships. However aboard the US ships you can get breakfsst at any time of day or night. Sailors all said they liked it when they were moored alongside. Booze and breakfast a "fair exchange." Just a bit of lore. No significance!