Although the academic labs are used for some of your technical classes, they are available during the times when lab classes are not in session.
All but two of the labs have classes meeting in them from time to time.
However, those labs with classes may be the only place to find some of the equipment or software you need. Therefore, it is important to check the lab schedules each semester to know when a specific lab is available.
Because classes will be using the labs during some of these hours, they do not indicate the availability of the specific lab you may need to use.