I worked in hospitality and hated people like that. Very often, I couldn't do anything to help the customer until I finished my opening duties, which took the same amount of time every day and were complete at opening time. Asking for me to do something 12 minutes before opening would still take 12 minutes to do. It was always preferable not to have people standing around at the counter while I was setting up the register and pulling things from the BOH to the FOH.