7) Set the Virtual Single to "Assign Bookings" = First Dependency Room
8) Hide the Single room from the booking page by setting SELL PRIORITY to "Hide". If you are hiding rooms you will need to adjust your overbooking protection in SETTINGS->PROPERTIES->ROOMS ->SETUP. For instructions please see the context help next to the setting.
'''Note:''' If you add bookings manually, place single room bookings into the Single or Double room as appropriate, no the virtual room.
'''Note:''' If you are using the channel manager and a channel allows multiple room bookings you are opening more rooms than you physically have. This causes a risk of overbookings.
Note: If you are hiding rooms you will need to adjust your overbooking protection in SETTINGS->PROPERTIES->ROOMS ->SETUP. For instructions please see the context help next to the setting.