http://www.houstonconventionctr.com/mee ... ations.pdf
Especially interesting is item 15 on page 9.
So it seems that the GRB Center itself is CHL-friendly.15. CONCEALED HANDGUNS
Possession of firearms is forbidden in the Facility with the exception of the following: (i) licensed peace officers and licensed honorably retired peace officers and (ii) exhibitors and patrons during duly licensed gun shows and (iii) individuals licensed by the State of Texas to carry concealed handguns.
But read it carefully. It doesn't say that a leasee is prohibited from posting the facility or portion of it that they lease with 30.06 signs. It just says that as far as GRB itself is concerned, "..... (i) licensed peace officers and licensed honorably retired peace officers and (ii) exhibitors and patrons during duly licensed gun shows and (iii) individuals licensed by the State of Texas to carry concealed handguns.", are OK.
That probably explains why I do not recall having to disarm when attending the big gun show at the NRA Annual meeting.