Here is an explanation from another thread explaining how to tell is a facility is 51% or not.
srothstein wrote:The law says the permit or license must be posted where it can be seen by the public. You can see what we determined by checking the permit. If it has a line on it that says "SIGN=RED" then TABC has determined that they are 51% and you can be prosecuted for carrying there. If they have a line that says "SIGN=BLUE" then they are not 51% according to TABC and you can carry there with a CHL.