Pretty easy process. As long as you know basic people skills and are able to handle taking orders they were ok with hiring you. It seemed that whether or not you get a serving job is based on how many spots they have open not your own qualifications. Many times they would turn people down and offer then a busser job instead
In person with multiple people being interviewed at the same time as you, usually starts with the manager and if they like you, they would introduce you and the owner of the restaurant will interview you and give you the job on the spot.
Easy and straightforward. Talk about your experience and why you want to work there. Hired me on spot and organized my orientation days. Worked with my schedule and accept seasonal work.