A recent invitation from a friend to eat at RR made me recall reading something about it here on OCDO, so I checked their website: https://www.redrobin.com/tools/gun-policy.html
"While Red Robin will follow state and local laws on this issue, Red Robin respectfully requests that guests refrain from bringing guns into our restaurants."
It seems to me that RR has move from a prohibition to a request (like Target and Chipotle).
And inconsistent enforcement of policy/rules - see comments:
"Red Robin has been removed from the Boycott, because despite corporate policy against firearms, we have not seen much in the way of enforcement of this policy. Many 2ACheck fans have been to Red Robin to test this policy and been treated with respect. We’ve been to the Red Robin near us in Virginia and open carried without incident as well. We believe they are not enough of an “anti” to warrant a place on our Boycott List."