In some states it is a punishable offense to ignore the signs, in others (as here in Iowa) they can only ask that you leave...if you don't leave then it becomes a punishable offense. If I have read correctly, it is a punishable offense in WI..so I wouldn't risk it by carrying in those locations or spending my cash at those establishments. The suggestions about talking to the owner/manager about the policy seems reasonable..if they are reasonable they just may listen and re-evaluate their position...if not...good-bye.
Disarming Victims Doesn't Solve Crime.