To setup Brainstorm in Rooms follow the steps below:

1. Go to the Brainstorm Tab and then 

2. Press the New Brainstorm button as shown in Figure 1.

Figure 1 - Create a new Brainstorm 

Once you click the New Brainstorm button you will be presented with a dialog asking for some basic details about the new Brainstorm you want to create.

Enter the Name of the Brainstorm and also the select the people you want to invite to the Brainstorm, see Figure 2

Figure 2 - Create New Brainstorm Dialog

Hit the 'Start brainstorm' button to complete the New Brainstorm setup and enter the Brainstorm session.