Table grapes are sized primarily by pruning, thinning, or, as in the case of Thompson Seedless, by a combination of that and gibarellic acid--which i probably mispelled.
Wine grapes are not grown for size, at least that is what they say, so additional genetic material is not a goal.
As a former grape grower i doubt if either the bees or the beekeeper can make a living off grape vineyards.