We are forced to use the lift at work. You may not use the stairs when carrying tea/coffee ('elf and safety you know...) and must use the lift, for 1 or 2 floors max. And given tea/coffee is on the ground floor, nobody uses their cycling muscles.....
Many years ago I caused a large company to do the opposite - they decreed that people shouldn't bring coffee and tea into the lift but to use the stairs. It happened when I was a newish engineer at the company and based in a block of offices. I was going down to the labs in the basement (engineers don't need light), and stepped into the lift to be faced with a bunch of smartly suited execs on their way up to the top floor where they did their exec stuff. I realised the lift was going up instead of down and backed out but the closing door caught my arm and knocked the tea, forming an arc of hot liquid to sprayed at groin height in the lift. I believe several execs had to attend their meetings with suspicious wet stains on their trousers. I might have been a marked man for this if it wasn't for the fact that the execs in the company never visited, or knew, anyone outside the top floor and therefore I could remain anonymous and undetected for the rest of the 6 or so years I worked there. However, there was a memo sent to the engineering teams that liquids shouldn't be carried in lifts for health and safety reasons.
As to the OP, the rules are really quite mad. Well done! What happens when people from other companies end up queuing for the lift together? Is there a pecking order of companies, is it done on a first come first served basis, or is there some kind of fight to determine who gains control of the lift? If no-one speaks to each other in the lift, how do you know they are from other companies? Are all the companies small and everyone knows everyone, or maybe company employees could all wear distinguishing bandannas ?