Hotel rates are set by the state, thus you must register by passport or special form. It is recommended that you check the room prior to handing over your passport. One-star pensioni are the cheapest. Breakfast and individual showers depend on the hotel. A Doppia has two beds in it, a matrimoniale has one double bed in it.
Private baths are generally more expensive.
Sites are generally noisy but modern. Prices often include breakfast. However, curfews, lockouts, and remote locations are sometimes an inconvenience. Prices can be exorbitant. Groups may have the advantage in getting reservations.