The men watched what Logan was doing at the bar, and frankly speaking, so did the rest of the bar, including Kurt. A couple in the corner slowly got up to leave, anticipating a fight, while others turned in their seats to get a better look. Even Kurt peered over his shoulder, curiously, his mug of beer hovering close to his mouth. He really didn't think Logan would use his claws against the men... that would be overkill, and while Logan was ruthless in a fight, he wasn't that vicious. Still, Kurt anticipated some broken chairs and bones - it wasn't worth it, to fight over him like this, even in principle.
"Oh yeah, smart ass?" The larger of the men, who seemed to be their leader, stepped forward, cracking his knuckles as he approached Logan, threateningly. "There's three of us, and one of you. Doesn't sound like much of a challenge to me, shorty."
Once he'd gotten close enough, he heaved a mighty punch at Logan, putting all his muscle into it.