Sleeping Cabins #1-4 upper and lower bunks are single bunks with curtains for privacy. These have less space but are more private. #5 and 6 upper and lower bunks are double bunks meant for two people to share. This is typically where couples are housed. #7, 8 and 9 upper and lower bunks are in the main salon. These bunks are double wide but usually only sleep single passengers. There is less privacy here but more room. Think camping on the high seas only better — we have air conditioning and do all the work!