I am not certain that coins earned serving VIPs are added to my total in any restaurant on any level. I have been testing my theory with the group goals to use boosts to earn tickets. When I serve only the VIP during the round and the summary screen pops up, no coins are displayed. It shows red stars and the occasional gold that I earned. I've tested this in Blue Nile, Carnvial Steakhouse, Big Bay, PT and Ultime. All with the same results: no coins. It just occurred to me the summary screen could be wrong. Next time I will look at my before and after coin total and see if it changes.