Could an airline have a lounge where half of it is airside, the other half outside, with a security point in the middle? It seems like that would get a lot of frequent travelers to join the lounge, to avoid the regular lines, and also never have to see the terminal/checkin. They could also have check-in and bag check there too. Seems like it would be a lot more civilized. I'm sure there must be something prohibiting this though.