Translation:This waiter does not work at this restaurant.
Why is the word restaurant in the genitive case? Shouldn't it be the locative case?
Restauracji may be either genitive or dative or locative. It's in locative here.
Thanks! When I hovered my cursor above the word, it said genitive so I was confused.
Please be careful with hover tips, they often miss some options (the hints are general, they don't necessarily fit the sentence you're doing right now, but they show all the meanings of the word). I added Locative and Dative after Djenthallman's comment, but it seems it hasn't been implemented yet.