Me, DH and DS 21 are going on holiday for a week next month, we have always shared a triple room on holiday, the room has 3 single beds in it. I just wondered recently whether this is not appropriate given that DS is an adult now. DH likes to book a triple room as it is cheaper. DS has never said anything against being in a triple room with us but maybe he doesn't want to complicate matters and just puts up with it.