The Diamond Lounge in Caesars Palace in LAS, except for 4 pm-6pm, had minimal items: salads (fruit and vegetable) chips, coffee and a few desert items--from 4 pm-6 pm: chicken wings and one other hot item. A waiter brought drinks. For the near term that arrangement shouldn't run afoul of VIRUS restrictions.
In AC, the 7* lounges at Caesars and Harrah's is waiter service only.