How do I rent out the whole place?

You already have a resource with shared price options. For example, a cafe-bar, in which there are 4 tables.

Create another price option. Click on +.

Enter Name, select type Exclusive and enter the price. Save.

Now there are 5 rates when booking. On the configuration it looks like this:

If you book whole restaurant, the tables disappear. Conversely, if you book one table, disappear whole restaurant.

Check the result on the widget: