Booking a Room for a Meeting
You can book a room for your meeting from within the Event Details page. In the Add section click the Rooms etc link to reveal a list of available rooms.
Click an Add link to book the corresponding room for your meeting.
If the room you require is not listed it could be because it has already been booked by someone else. If you remove the tick from the box labelled Show only available you will be able to see a more complete list of rooms. From here you can in theory request a room that has already been booked.
The resource manager in your department would then need to decide who had the most legitimate case for using that room.