Wis. Stat. § 134.48: Contracts for the display of free newspapers.

(1) In this section:

(a) “Newspaper” means a publication that is printed on newsprint and that is published, printed and distributed periodically at daily, weekly or other short intervals for the dissemination of current news and information of a general character and of a general interest to the public.

(b) “Place of public accommodation” means a business, accommodation, refreshment, entertainment, recreation or transportation facility where goods, services, facilities, privileges, advantages or accommodations are offered, sold or otherwise made available to the public.

(2) A contract for the display of a newspaper that is distributed free of charge to the public in a place of public accommodation may not prohibit the person displaying the newspaper for distribution from displaying any other newspaper that is distributed free of charge to the public. A provision in a contract that violates this subsection is unenforceable, but does not affect the enforceability of the remaining provisions of the contract.