Use the Find Available Locations widget on the Home page of 25Live.
You may search for rooms available on a specific date and time or look for times and days available in a specific location. Just pick the option that better suits your needs. If you are looking for a classroom available to everyone on campus, select the *Unrestricted SMART Classrooms location search. If you are looking for a conference room, select the *Conference Rooms Booked in 25Live location search.
If you are looking to reserve a "restricted" room, you may need to request permission to use it from its "owner"; you can find this information by clicking on the location name, then the Details tab, and Comments or Location Scheduler section.