ORS § 659A.409
Except as provided by laws governing the consumption of alcoholic beverages by minors, the use of marijuana items, as defined in ORS 475C. 009, by persons under 21 years of age, the frequenting by minors of places of public accommodation where alcoholic beverages are served and the frequenting by persons under 21 years of age of places of public accommodation where marijuana items are sold, and except for special rates or services offered to persons 50 years of age or older, it is an unlawful practice for any person acting on behalf of any place of public accommodation as defined in ORS 659A.400 to publish, circulate, issue or display, or cause to be published, circulated, issued or displayed, any communication, notice, advertisement or sign of any kind to the effect that any of the accommodations, advantages, facilities, services or privileges of the place of public accommodation will be refused, withheld from or denied to, or that any discrimination will be made against, any person on account of race, color, religion, sex, sexual orientation, gender identity, national origin, marital status or age if the individual is of age, as described in this section, or older.
ORS 659A.409