'Suspended' coffees

Tonino Guerra

This story will warm you better than a coffee in a cold winter day !

We enter a little coffeehouse with a friend of mine and give our order. While we're aproaching our table two people come in and they go to the counter :
'Five coffees, please. Two of them for us and three suspended'
They pay for their order, take the two and leave. I ask my friend:
'What are those 'suspended' coffees ?'