Well I've had my old Citroen ZX for about 10 years - enormous boot with the seat folded down that swallows the bike whole - and I ride part of my commute each day - bike goes in the back of the car.
So into the car dealer as the old ZX is getting a bit ropey, ask to look at one of theirs - salesman opens the drivers door for me to step inside, but I'm sizing up the boot space and he has to prove it's got enough space for the bike before I'll even look at the business end!
The other half has disappeared inside the show room at this point to avoid the toe curling embarrasment of witnessing my eccentric bike search but that's my criteria - no room for the bike - no deal!