but would they get some sort of "group discount" on the event venues?
I would imagine that space for all the team bases would be at a premium, but imagine the overwhelming presence to the locality if it were indeed "sailapalooza" Like Newport? Plymouth? Someplace windy in China? Of course France & AUS, since they're sailing fanatics
Throw in a boat show and holy crap think of the attendance....
Generally, the venue pays the event to be there either through direct monies and/or construction and/or waved permits/fees, security, staffing, etc.