I'd be checking out some places around "The Hill" to see if anyone has a traditional spring lever machine they are serving shots from. When we used to visit, there were some fantastic Italian restaurants in the area. That has been many years ago so things have likely changed a lot. Perhaps one of the locals there could give you a hint where to look. If you could find a place using a Bosco it would be golden and you could find out what all the talk is about. Is the Bosco perfect? Probably not, but it and a good grinder are the two best purchases I have made in my espresso journey. My first shot from a spring lever machine was at a little shop in Cicero, IL some years back and it got my undivided attention. That is the shot that got me stated into the rabbit hole of espresso, three machines and 4 grinders later I am a happy man.
Suffering from EAS (Espresso Acquisition Syndrome)