more tips:

at check-in, explain your situation, you might get a supplementary voucher for the
Lounge

In the lounge, (or if their is some quee at the lounge-entrance ask already there) ask
another member (who sits there alone,) to get your second guest in

wear diffent things when you enter twice: first with raincoat, second without etc.

just for Swiss-german-dialect-speaking-persons (but may be it could work with some
cockney too): just deny any "Oxford-"english-knowledge, I sometimes can't speak but
Swiss-german - and may be they give up.