An extra fee may be charged for additional guests staying in the room.
Before setting up an extra fee, the "normal bed count" needs to be set for each room category e.g. for double room normal bed count is 2. The normal bed count is set in the settings->space configuration->room categories->normal bed count.
Once done, add "extra bed count" needs to be set. This number shows to how many additional guests may be accommodated on the room.
Next step is to set the extra fee. This can be done in the settings->sales->services->stay->rates->extra bed adjustment - enter the fee that additional guests need to pay.
MEWS will charge automatically the fee for every extra person staying in the room (up to the max. capacity of the room).