A word very common to Worcester, MA into the 1960's, maybe even used today. It's the porch on a three story house (a three decker). I lived in a three decker house and had a back porch and a front piazza.
The family would go out on the "piazza" on hot or rainy days to get out of the house.
A catcher for the New York Yankees, presumed to be gay. Possibly referenced in the song "Piazza, New York Catcher" by Belle and Sebastian.
From the song: "Piazza, New York Catcher, are you straight or are you gay?"
In general: "Hey did you hear about Mike Piazza? He said he's not gay, but I bet he is."