First, I am not a lawyer, and this is not legal advice. Use your best judgment.
Assuming the building is not a facility that falls under state prohibition for carrying firearms I believe they have no authority to ask you
to leave. This is not private property and it is not a private meeting. If they want to call the cops that's their choice. What are the
cops going to do? Arrest you for... what? If the cop(s) order you to do something your best bet is to clearly state that you do not
consent to their orders but you will comply. Then you must follow up by initiating a private complaint against the officer(s) and see
if you can get with Internal Affairs and get an investigation started.
I imagine they are within their authority to ask/demand you to leave if you are causing a disturbance, or acting disorderly or disruptive.
Your job is to make sure that you never give them that opportunity. Open carry of a firearm, in and of itself, is not disorderly conduct.
Just to prove the point here is the statute for Disorderly Conduct in Pennsylvania:
Link:
http://law.onecle.com/pennsylvania/crimes-and-offenses/00.055.003.000.html
Notice the parts I bolded. Carrying a firearm for self-defense IS a legitimate purpose.
I have a small digital voice recorder that easily fits a shirt pocket. It is very sensitive.
These things can be very valuable when it's your word against theirs and they are getting
cute with their recollection of events and spoken words. You can believe I would be
carrying mine. I know here in York they are always audio/video recording these sessions
anyway, but this would give you YOUR recording. If it looks like things are going to get
ugly I would pull it out and let everyone know you are about to begin recording, then turn
it on. The law says people have a right to be free from electronic interception, so tell them
they are being recorded. After that, if they speak it's on them. You ought to record
yourself telling them they are being recorded. You do not need their permission. If they
don't want to be recorded they can shut up or leave. The law also says that police officers
have no expectation of privacy in the performance of their duties in public places, as they
are public officials. A public council meeting is hardly a private place.
I
seriously doubt you are going to have any trouble in this, I am just trying to cover some
of the more important ideas. Remember, you have
every right to be there, and
every right to
carry there.