imported post
The areas not open to under 21 are required to have a physical barrier of at least42 inches in height.
WAC 314-02-025
(3)
Barriers - Licensees must place barriers around game rooms and areas that are classified as off-limits to minors.
(a) The barriers must clearly separate restricted areas, and must be at least forty-two inches high.
(b) The barriers must be permanently affixed (folding or retractable doors or other barriers that are permanently affixed are acceptable). Those licensees that have been approved by the board for moveable barriers prior to the effective date of this rule may keep their movable barriers until the licensee requests alterations to the premises or the premises change ownership.
(c) Liquor bars cannot be used as the required barriers (see definition of liquor bar in WAC
314-02-010(7)).
(d) Entrances to restricted areas may not be wider than ten feet. If a licensee has more than one entrance along one wall, the total entrance areas may not exceed ten feet.
(e) "Minor prohibited" signs, as required by WAC
314-11-060(1), must be posted at each entrance to restricted areas.
(4) If the business allows minors, the business's primary entrance must open directly into a dedicated dining area or into a neutral area, such as a lobby or foyer, that leads directly to a dedicated dining area. Minors must be able to access restrooms without passing through a lounge or other age-restricted area.
This makes it pretty easy to figure out. ALso, that area is supposed to have signage telling of the restriction.
