On Mariner this week, the buffet was self serve, but I noticed that the staff replaced tongs regularly. Yes, there were crowds at certain times in the Windjammer. No social distancing. Few masks worn except for the crew who were masked. Before you enter the Windjammer there is an area for enforced hand washing. The energetic attendant is pleasant but insistent that you "washy, washy."
There is no social distancing in elevators and folks just crowd in. The theater was packed for most shows.
Have to say, though, the cruise I was on this week was a Memorial Day cruise crammed with families and kids of all ages. The kids were the most I had seen at one time in over two years. An officer told Hubby Mariner had 3300 passengers, so I guess the days of sailing forty or fifty percent full are over.
Had a great time though even if the crowds and noise were tiring at times for someone used to pandemic restrictions. But we had fun and I was sorry when the cruise ended.