A remedy for wasps at the garden table:
Put one (or more) open containers (eg a soup bowl) filled with cold water with a few whole cloves. It gives a nice air that wasps find dirty and therefore will avoid the table.
Take a lemon cut him in quarters plug into wedges cloves and wasps stay away.
Put some coffee (unused) on a saucer and put it on, that keeps the wasps away (it stinks a bit).