When I booked my stay at the Best Western Docklands Antwerp my booking included a cup of coffee from the house and some complementary pastry. A simple, but nice gesture from the hotel. The next morning, my girlfriend and I sat in the modern looking dining area and we got plate with donuts and apple pie with some whipped cream.
I’m not that keen on sweet food, but a apple pie with some whipped cream and a cup of coffee is something I can enjoy.
Another thing that was complementary at the hotel was a coffee machine right outside of our room. With the machine you could get unlimited coffee (you could choose different kinds of coffee), tea and hot chocolate (although instant hot chocolate) with the latter being my choice of drink. Still, like the complementary pastry, gestures like this do give a hotel a plus point.