A twin room will have two separate beds, but usually these can be coupled to make a double. As for doubles being smaller than in America, Europeans are smaller and prefer closeness to each other. WillTravel , Sep 21st, 2004 07:28 AM.
A single room has one bed, a double room has one double bed and a twin room has two beds. (In some hotels a double room may in fact be twin beds pushed together). Some hotels have sometimes triple or even quadruple rooms if you travel in group.
Both types of these hotel rooms are designed for two people. The twin room has two single beds.The double room has one double bed, so-called, a marital bed.