You can setup communication with the Aubergiste interface.
Aubergiste creates a file named FilePlan.txt containing all occupied rooms.
When an invoice is settled to a room, Maitre'D verifies in that file that the room is occupied.
If so, the transaction is saved in a second file named FileIn.txt.
Aubergiste then read from that file to add restaurant invoices to the room accounts.
Aubergiste