Oooh, I think those are hard to use. When I waitressed at the country club I used the regular "key" for opening wine. Otherwise I'd be standing there like an idiot, grunting and pulling. I'd have to sit on the floor and hold the bottle with my feet as I tried to disengage the cork. When said cork came free I'd probably fly across the room.
(Otherwise I'd be standing there like an idiot, grunting and pulling.) Oh my, that doesn't sound very professional.
