Billy T James, the late great comedian, wrote and performed a brilliant song called BYOG - Bring Your Own Grog.
It's sung to the tune of the YMCA song by the Village People, and it tells the story of a man who's expelled from a party for failing to supply his own beverages, even though he knew the party was a BYOG.
They kicked him out on his %^&#, 'cause all he brought was a glass,
He knew the party was a B Y O G....