J’s Down Und’r has been a staple of downtown Buffalo, MN for roughly 40 years. This unique biker dive bar is located right off Buffalo Lake, but you won’t necessarily know it’s there unless a local brings you. That’s because it’s nestled down an alleyway with a sloped entryway that leads into the perfect windowless dive bar. Dark and boozy — just the way we like it. Sinners welcome.