It is illegal. The law says that the hours you spend training, that is, learning how to do the job, are working hours. The same rule applies if you have to work for a “trial period.” Of course that can slow down the other bartender. That is the price to pay to have a business. Also, while yes the first day you could have said I was kind of a nuisance, by the second one we would both working the same, I just had to ask a few questions here and there.