Just to follow up on this, I read an interesting interview with Steve Kranish (formerly of Parker Brothers). According to Steve, PB had a Sky Skipper cocktail unit to use while the 2600 port was in development. He said this about the game:
"That was a truly insipid arcade game; in fact it was so bad that I was the only one in the office who was willing to play it (I am not a gamer, remember?) so I became the local expert and could answer questions for whoever got stuck writing the port. The Marketing Bozos had agreed to sell it in hopes that doing so would provide access to future games, which I don’t think ever happened.
The Sky Skipper that we had in the office was a table model, rather than an upright arcade game. The monitor was under a glass top. I think the idea was that one had to be drinking to be willing to pay money to play such a stupid game, and the table top provided someplace to put your drink while you played. This does not explain my willingness to play it; I do not drink."
I don't know if that's the same unit that Nintendo supposedly has. If not, I wonder what happened to it?