Fifty year anniversary kick-off for Caffe Trieste. So espresso or cappuccino will be at original 1956 prices. They don't say, how much that is though.
Not sure if it is only the North Beach location. However, Papa Gianni, along with Fabio and Sonia Giotta, and the youngest Caffe Trieste diva, gen. manager Ida Pantaleo will be at North Beach.
If you never met Papa and the gang, it is worth a trip in itself. Might be quite a people watching event too. The North Beach location is a hang-out for lots of aging rock band members and other SF celebs.