I just returned from the Equinox on May 15th and tried to social distance while indoors. I rarely took elevators and when I did I wore my mask. I participated in Silent Disco but found a place to dance that wasn't super close to others and when listening to music wasn't super close to anyone else. I did eat in the dining room and buffet. At the theater (only went to a couple of times during the 9 night cruise) wore a mask and/or set away from others.
I was very fortunate and neither myself nor the friend I travelled with came down with Covid on the ship or when we returned. I also wore a mask on the plane going and coming.
Hope this helps.