Filip, since Covid all British pubs have had to do table service. (Hooray!) Many pubs are using a sort of app. There is a QR-Code on the table which you scan, this takes you to a webpage with a list of all the drinks and food available they have on sale. You choose what you want, put in your details and pay by credit/debit card. This goes straight through to the bar who put the order together and a waiter brings it to you. Do you know if this system has been introduced in Belgium?