Originally Posted by
humanoid94
Officially you have to be flying *somewhere* to get access. In reality, I don't know how much this is enforced, especially in the ex-Worldclubs.
Unless you have a good reason to get beyond security like for example escorting someone, chances are you'd have a boarding pass anyway. We rely on the boarding pass because it has our skyclub membership noted. I've entered with boarding passes from other airlines and been granted access by showing my membership card.