There are faltering old women and naive and lively students. Pay attention to the consistency with the previous structure when adding sentences. The structure of "white-collar workers in suits and ties" is "adjectives and nouns", so "there are faltering old ladies and naive and lively students" can be added. The whole sentence is: "The noodle restaurant is full of customers, including white-collar workers in suits and ties, faltering old ladies and naive and lively students".