...what sort of state would it be in?
I had this happen twice recently, my flat is on the market and the estate agents couldn't get hold of me so I opened the door in horror to estate agent + potential buyer and had about one minute to whip tights off of lampshades etc (estate agents were hilarious, I heard him say to potential buyer's remark that it's quite small 'no, it's bijoux, cue me snorting with laughter in the background).
Then I cleaned up quite a lot and had a friend visit short notice couple of days ago but didn't feel self conscious at all as we're both clutterers and it was a bit improved (no tights on lampshades).
I live on my own so that's a bit different but how would you cope with impromptu visits, would you pass muster??