I see y'all are still flailing away at this poor dead horse.

So just a couple of more things.
Just because someone took a class and managed to shoot a passing score does not mean that they are either "properly trained" or a "responsible gun owner". I think every one of us knows or has seen a person with a Handgun Permit and wondered "Why is this idiot armed?"
If you've ever witnessed a permit class on qualification day at the range, you've no doubt hoped that one or two of them would fail. Some of them can be downright scary.
Until I get to know you, your attitudes and behavior with a concealed firearm, I believe the safest course is to assume you're a moron and keep an eye on you. Hopefully you will prove otherwise.
I'm a firm believer in the doctrine that A Man's Home Is His Castle. Its your house and your rules. I may not always agree, but I will honor and respect your wishes. Likewise, I won't assume that just because I think something is ok that you will too. If there is the slightest doubt, I will ask and get permission first out of respect for you and your home.
The party was last Saturday. As it turns out, when I picked up my girlfriend she informed me that she had already discussed my firearm with our hosts and they were just fine with it. So I kept the gun on me. While I was fully aware that our hosts knew I was armed, the subject never came up for discussion.
Good food, good folks and a good time was had by all.
And despite all the worry and warnings, it turns out that I didn't need to shoot anybody.