Translation:The glasses in front of the guests are empty.
------- it's a little clumsy, though. the glasses are empty = a perfectly good sentence, but when you add "in front of the guests " after "empty ", it's trying to describe "empty", not the glasses . you're answering the question, "which glasses are empty ? " and the answer is, "the glasses in front of the guests... " are empty . . .
Big 7 apr 19