The thing with London Bar Staff is that with cooperate companies they see adding up in your head, serving 3 to 4 people at time = Extra Spillage, Incorrect Adding up, wrong change giving, theiving/free drinks Therefore if they employ staff who can't add up thier head, can only serve one person at a time and then have to use the till to make sure they get the right change then there will be less spillage, less chance of mistakes and less chance of theiving When I first came to London after working in Ireland and then back home in Wales, I found that working for BASS, was actually brain numbing and I missed the challenges of remembering people's orders, and showing off the ability to add up in my head and have the change ready when I noticed that they were about to give me a 10 or 20.