I will tell you one of my secrets of being an above-average-waiter. The secret word is proactivity, anticipating on (un)expected situations. The biggest fun is when your guest doesn’t expect this.
Some time ago I had a family with a girl who had an allergy of gluten. It was her birthday so we woud celebrate it with some music and all the waiters clapping etc. In all the cakes we have there are gluten, so the family was thinking about cancelling the cake. However they ordered it because of the little ceremony we perform.
In the kitchen I got suddenly a image of everyone eating the cake but the birthdaygirl who was looking sad to everybody eating her cake. So I managed to bring the cake and a fruitsalad for the girl. Needless to say that the family was very happy with this!