Way number 1, through the Calendar app:


  1.  Open GSuite Calendar

  2.  Click the plus symbol next to "Other calendars", found below "My calendars" on the left panel.

  3. Click "Browse Resources"

  4. Select the Caret next to City Hall

  5. Select the Calendar in question with a check mark to add shared resource calendar to your calendar views in the "Calendar" App


Way number 2, through "Create an Event"

  1. Open GSuite Calendar
  2. Click on the Large Create button
  3. Create event as normal, go to "More Options"
  4. Click on "Rooms"
  5. Choose the appropriate room, then use "find a time" to look for conflicts, or available slots.