On December 7, Colonel MacNab marched about 1,000 regulars and militiamen up Yonge Street and attacked Mackenzie's force at Montgomery's Tavern, putting the building under artillery fire. When MacNab advanced his infantry, both parties of rebels abandoned their posts and retreated in disarray to the tavern, causing those assembled there to panic and flee. Within 20 minutes, the rebels were gone. Loyalist forces then looted the tavern and burned it to the ground, before marching back to York.
Pretty nice bar brawl.