First you will want to mount a monitor/tablet near the meeting room you wish to display upcoming bookings for. Then you can use the free Meeting Room Display Add-on so that your members can see when the room is available at a glance.
To install this Add-On, click on the Setup tab, then click on the Add-ons tab. Scroll down until you see the Meeting Room Display Add-on, then click on 'Visit Add-on' and follow the steps.
Once you have done this, you will be able to show upcoming bookings for selected rooms.