In the Day's Resources in Each Venue group calendar, you can see the resources needed in each venue for the selected day.
If you DO NOT specify which venues you want to see in the Filter on the left, the group calendar will display only those venues that have resources needed on that day.
If you DO specify which venues you want to see in the Filter on the left, the group calendar will display only those venues you have selected, whether they have resources associated with them or not.