I've been told sometimes you can get a club member with status to take you in as a guest. I've also had a friend tell me, for example, in Santiago (SCL) he paid $30 to get in, which for a shower, ...
For an upcoming trip, it looks like for my US departure I'll have access to more than one airport lounge. (One via FF status, a different via a credit card). This is a nice position to be in, but ...