I carry a knife in my pocket as well, I dont feel a need to inform the homeowner. Its the operator not the tool.
Concealed is concealed, if all those people know you are armed, its no longer concealed, and if imbibed family or friends know you carry, it could be a recipe for worse things to happen.
If I am ever asked, I say, "No Im not carrying."
If someone somehow knew and felt uncomfortable, then I would leave.
I dont even inform other gun owners that I would carry, especially if I did not know them, unless this was a open carry gun barbeque.
Nobody is supposed to know if you conceal, only my wife and eldest daughter know. FYI I dont drink for a myriad of reasons, but self righteous indignation is NOT one of them. Stay safe