I found this claim:
Generally speaking, property owners have a right to exclude anyone from their private property for any reason. There is, however, one major limitation on this general rule: federal, state, and municipal public accommodation statutes. These statutes prohibit private property owners who operate “public accommodations” from excluding customers on certain discriminatory grounds.* For business owners, this raises two questions: (1) what qualifies as a public accommodation, and (2) who do public accommodation statutes protect?
What Qualifies as a Public Accommodation?
Under the federal public accommodation statute, a “public accommodation” is one of the following:
Hotels and other businesses providing lodging to transient guests;
Restaurants and other facilities principally engaged in selling food for consumption on the premises;
Places of exhibition or entertainment; and
Establishments that are within or that purport to be a hotel, restaurant, or place of exhibition or entertainment.
See 42 USC § 2000a(b). Thus, restaurant owners should take heed—restaurants are always public accommodations and may be subjected to lawsuits for allegedly discriminatory practices.
http://www.kpmlaw.com/drawing-the-lines-on-discrimination-claims/