We had sat down in what looked like a normal cafe away from the sights. My mistake to just order 2 ice creams from the waitress without seeing the menu - 2 desert glass things filled with about 3 scoops of ice cream and 2 squirts of cheap cream + a mini wafer. One was 18 Euros and the other 15 Euros. My own silly mistake for not checking the menu before ordering.

Definitely book the main attractions in advance, though. The queue for the Colloseum was nearly as big as that for the Vatican Museums. I must have saved us 5 hours of waiting in total.