Depending on your needs, you can create a calendar for a shared room or a shared resource or you can add a room or resource to an event. You can also use your Google Calendar to create appointment slots. Conference rooms and chromebook cart sign-ups can all be scheduled using Google Calendar. 

Resources:

GSuite Learning Center: Google Calendar

Google Calendar Help Center: Create a Calendar for a Shared Room or Space

Google Calendar Help Center: Add a Room to an Event

Google Calendar Help Center: Appointment Slots

Alice Keeler Teacher Tech: Calendar Appointment Slots

Using Tech Better: Scheduling Time with Students Using Appointment Slots