Sgt. Carol Pacey said two men were being "aggressive, rude and belligerent" and upsetting the staff and other patrons at the Lazy Flamingo. One of the men punched a bar bouncer in the face when he asked them to leave, Pacey said.
The bouncer sustained a cut on his lip but wasn't seriously injured.
Pacey said that Mair, 25, was arrested at the scene and charged with the least serious form of assault. Mair was released without having to have a bail hearing. He will now have to abide by probation-like conditions of good behavior until the case is resolved in court.
Mair would usually be taking part in training camp this time of the year, but the NHL season has been delayed because of a lockout that threatens the whole campaign.
The Hamilton native played junior hockey with the Owen Sound Platers of the Ontario Hockey League before he was selected 84th overall by the Toronto Maple Leafs in the 1997 NHL draft.
He played with the Maple Leafs and Los Angeles Kings before landing with the Sabres three seasons ago. He has 14 goals and 42 assists in 212 NHL games.