This is what I posted back in 2010:
http://forum.opencarry.org/forums/showthread.php?81974-WorkSource-Center-no-weapons-policy
I have something useful to convey that may affect people who OC.
Within the last 2 months I attended a Employment Security Department seminar on workplace safety at a state WorkSource Center. No, I won't say which one. Not that it matters since this training is being conducted at all WorkSource Centers in WA. The topic came up regarding the no weapons policy that's written on a warning notice on all external doors. Some guy at the meeting asked the instructor about open carry and how that affects the WorkSource Center. The instructor replied that they won't allow any guns, period. He made it clear by his response that this is just the way it is and that the inquiry was over.
The worker persisted in his questioning and what happened next may be of interest to you. I wrote down the instructors response as best I could.
The worker tried to point out that according to the article he read, the restrictions on OC only applies to a jail & ... : that's when the instructor cut him off. He said the policy is this, no matter what the Employment Security Department won't allow guns OC or CC on the premises. He said that TPTB know it may not be legal but will take the chance of getting sued rather than allow guns in their buildings. His comment made it clear that they don't care about following the law. The instructor then said that no one inside of a WorkSouce building can ever tolerate any weapon. He then gave the example of what we should do if someone walked in with a gun showing (or CC); call the police on sight. This is official policy.
In the booklet we were given there was this:
RCW 9.41.270
Prohibited: weapons apparently capable of producing bodily harm - unlawful carrying or handling - penalty - exceptions.
(1) It shall be unlawful for any person to carry, exhibit, display, or draw any firearm, dagger, sword, knife or other cutting or stabbing instrument, club, or any other weapon apparently capable of producing bodily harm, in a manner, under circumstances, and at a time and place that either manifests in intent to intimidate another or that warrants alarm for the safety of other persons.
This is all I have to share.