We have a 2-bed condo and currently charge $20 for the 3rd (& 4th) person/"extra guest" (under Extra Charges).
But all too often we're getting bookings from 2 guests who, for all sorts of perfectly valid reasons, want a bed each (eg. mother/daughter, two conference-goers).
For those non-couples it means twice the work for us, with no additional charge for them.
I'd happily forego the second $20 for the 4th guest, if I could simply charge $20 for the use of the second bedroom.
How can I do that?