I submit the answer is Buffalo, based on lyrical evidence that may be representative of what the public thinks:
Tee Grizzley - Grizzley 2Tymes
"All my n****s gettin' green, b***h, we play for Boston (Yeah)
Nah, all my n****s gettin' blues, b***h, we play for Buffalo'"
Question: Wouldn't St. Louis have been a better choice, since "Blues" in St. Louis doesn't refer to sadness? I mean, musicians want irony here, right? [Or are the lyrics referring to when the Bills play in all blues, or even the Sabres?]
Irony, for example:
Lil Wayne - Broke Up
"Okay, it's Gudda, h**, all about my Bills like Buffalo'"
[The Buffalo Bills have nothing to do with a financial obligation, a "bill".]