wait·staff 
/ˈweɪtˌstæf, Brit ˈweɪtˌstɑ:f/ noun
plural wait·staffs /ˈweɪtˌstæf, Brit ˈweɪtˌstɑ:f/ noun [count] US : the group of waiters and waitresses who work at a restaurant
▪ a friendly waitstaff — often used with a plural verb ▪ The waitstaff were very helpful.
▪ a friendly waitstaff — often used with a plural verb ▪ The waitstaff were very helpful.
