ASK A QUESTION "Que quieres tomar/comer?"
When working as a waiter, in your average restaurant, not a fancy 5 star...would it be correct to use "Que quieres tomar/comer?"or is there a more polite way of asking? (besides substituting quieres with quiere...usted)
HI dreaming, you might want to say this:
**¿Desea tomar algo?
¿Qué desea tomar?
¿Qué le apetece tomar?**
I would not use the sentence you have suggested. First it is the second person , not the polite form. And it is too straightforward. Not done in any restaurant.
¿Que desea(s) tomar?
Heidita is right. Being too polite is better than not enough.