It depends on the shot size. In the UK there are two shot sizes which can legally be served in a pub or bar: 25ml and 35ml. This means either 40 or 28.6 shots are in a litre depending on whether...
No such census is taken for the number of models in the UK so the exact number is unknown. However, it is fairly safe to say that there are a few hundred thousand (that's including all types of...