When I was in sailing camp during summers, there was one or two times where where the wind was just dead and we couldn't really do anything.
The lower level sailers (white sail, in the Canadian yachting system) were crammed 4 to a boat, while we more advanced sailors (bronze sail) were 2 to a boat mostly and our boats were lighter.
On these dead days, the bronze sails would have one crew jump onto the bow of the white sail boats, and rock the boat back and forth until they capsized, and swim back to their own boat.
I have no idea how they let us get away with it. We just thought the white sails needed practice righting their boats. But those were the most fun days of the summer.