Drives me bonkers!!
We are a small group of five friends. We all happily share playdates at each others house - all except one.
Two of us live in flats with no gardens but still manage to get everyone around. (9 DC's including the siblings)
This particular person has a great back yard and a house bigger than some of us but very rarely has anyone around. In the past five years I'm sure it has been less that half a dozen times!! We usually meet every week or every other week, sometimes at outside locations but generally a playdate at someones house a few times a month.
She even had the nerve to say recently that she would have everyone over to her place (not her home but where she was housesitting) and they could 'trash' that.
THANKS - for thinking playdates at my house are an opportunity to trash my home 
No one else seems bothered (or has said so at least) but it annoys me.
To be honest I would never say anything to her, except maybe as a 'joke' or in passing. And I wouldn't not invite her as we've always done things as a group.
I'm just having a rant really.