To book a Hotel for a family of 4 or more people simply go to the hotel search engine, search by city, add the check in and check out date, edit room options by selecting Add Room by clicking on the grey human image next to the Rooms (2 Adults box) to display 1 Adult and 1 Child per room. If there are more than 3 children you will need to add 1 Adult and 2 Children to 1 Room and 1 Adult 1 Child to the second room (don't forget to add the age of each child).