100% go for a line up first, dont get scammed. You'll face dragons and donkeys who give ya a bit of lip and attitude if you dont pick, you are entitled to walk, its your money. Back in the day the dragon at kellys asian flowers used to get pissed off if u view all the ladies and bail. Kelly is now retired and shop has new owners - lucy and her husband, Ross? I think.

Some places force you to pay up front before a viewing, eg. A touch of more class. Its a shit system but you do get it back in a form of a voucher if you dont pick and decide to walk.