Season 7, Episode 3: "The Maestro"

Well, don't you think that he was probably called Maestro...

...while he was conducting. Not in social situations.

I mean, his friends probably just called him Lenny.

I happen to know for a fact that he was called Maestro in social situations.

I once saw him in a bar, and somebody said:

"Hello, Maestro, how about a beer?" Okay? So that's a fact.