The horizontal arrangement of your layout is possible, but takes more work to set up than a vertical arrangement where each row on your layout represents a different room.
To show data from a series of related records in columns like this, use a series of one row portals. Each portal can have a different portal filter for a different room or you can specify initial row 1 for the first one row portal, initial row 2 for the second one row portal and so forth. We call this method a "horizontal portal".
Which approach will work best for you will depend on the structure of your database and what a person interacting with this layout needs to do.