Walked into the doors of the church on Friday to get my 10,000 things done and was immediately aware that my church was not friendly. I nearly fell flat with the overpowering smell of varathane (or whatever). We had redone the floor of the fellowship hall. So, we invited everyone out of the building for a couple of days- enter at your own peril.
It reminded me that there are valid reasons why we are not friendly sometimes. Our responsibility at those moments is to warn people, and let them know this is temporary. "Floor redone. Place stinks. Come back on Sunday." or "I am so busy I can't breath right now. Call me tomorrow." "I am totally grumpy today. But I will need a hug in about an hour."
It is ok to not be friendly sometimes. But it is friendlier to warn folks and invite them back later.