A tavern is any establishment, other than a private or fraternal organization, in which alcohol beverages are sold for consumption on the premises. Wis. Stat. § 941.237(1) fm) and (3)(cx).

No one may possess a handgun in a tavern unless they are a law enforcement officer, a correctional officer in the line of duty, a member of the US armed forces or national guard in the line of duty, a private security person meeting certain criteria, the tavern licensee, owner or manager or their authorized employee or agent, or have a CCW license or valid out of state license. Wis. Stat. § 941.237(2) and (3)(a)-(cx).  A peace officer, a Wisconsin CCW licensee, a qualified out-of-state licensee, a qualified out-of-state law enforcement officer and a former law enforcement officer can carry a concealed handgun in a tavern and a CCW licensee and authorized out-of-state CCW licensee can carry a concealed handgun in a tavern only if they are not consuming alcohol on the premises. Wis. Stat. § 941.237(3)(cr), (ct), and (cx).

It is illegal for a person who does not possess a CCW license to carry a concealed handgun in a tavern. Wis. Stat. § 941.237(2). This prohibition does not apply to an unloaded and encased handgun in a vehicle in a parking lot, a private or public gun or sportsmen‘s range or club or if possession of a handgun is authorized by the owner or manager of a Class B license or permit premises for a specific event of a limited duration. Wis. Stat. § 941.237(3)(e) to (j).

However, it is a class A misdemeanor (punishable by 9 months jail and/or $10,000 fine) for anyone to go armed with a firearm while under the influence of an intoxicant. Wis. Stat. § 941.20(1)(b). “Under the Influence‖ has been defined as materially impairing the ability to handle a firearm which is further explained as consuming ―an amount f
alcohol to cause the person to be less able to exercise clear judgment and steady hand necessary to handle a firearm.‖ WI Jury Instruction-CRIMINAL 1321.