Triple room can be a twin or double room with an extra bed.
Twin Room is a room with a pair of single beds for 2 persons. Some five-star hotels might offer 2 queen-sized beds or king-sized bed.
Double Room: a room with a large bed ideally for a couple.
Single room is a room with a single bed for 1 person only. In Vietnam, Cambodia, Laos, Myanmar, Thailand, we often use a Double room or a Twin room for sole use as true single room is not available in Southeast Asia.
It means Run of House. Normally, the room of lowest category is considered as ROH. For example, Standard and Superior room.
We always ensure that the hotel you asked for is indeed available for you. Yet, in case something you wanted is not available, we will inform you within 24 hours of order placement. Further, to reduce the inconvenience, we will suggest alternatives to you.