Loud noises late at night, like heavy carts rolling around. We were below the laundry or dishwashing area or something like that. The cabin next door 3673 came over twice to ask us what we thought about the noise, saying they couldnt stand it and kept waking up. no staff member could explain what the noise is. (or didnt want to). Neighbor-cabin thought we were by the ship's screws. I had no problem sleeping in 3671.