Since my first visits to Bergamo I recall going to a bar called La Vela per un aperitivo and soon it has become my favorite time of the day. Aperitivo time!
In Italy aperitivo is usually served around lunch and dinner time and it is perceived as a snack before the meal or something you have while hanging out with friends. Abundance and the cost depends a lot on a place that serves it.
I had aperitivo where we ate pasta, mini sandwiches, pastries in a buffet kind of a setting and those where I was served only potatoes chips and some nuts.