(NOTE: If your events are being held in different buildings, you may wish to include building information / address information in this column description to help people locate where your Room B is.)
NOTE: If you have different multi-room events in different years, you may wish to make new room Columns for each event, so that your past events do not display in the same column view as your current events (as appears below). However, for simplicity’s sake, and to illustrate the potential issue, this column structure was left in place in the example view.
If you have a single track instead of multiple tracks, you could also convert the column type to a Day of the week or a single Date. (You can play with the options by using Duplicate This and adjusting your copies.)