not knowing the meaning of small-scale

Ever since I moved in to my new flat, I've been meaning to have people around for dinner/afternoon tea/brunch/something similar and I have finally done it. Well at least the inviting part. And as a result, have encountered the problem with having a large circle of friends- there are a lot of them. I've just realised that I'm making dinner for 9 people on Saturday night- 11 if I count Sarah and Sean, which I feel I should. Don't get me wrong, I'm not complaining. When I realised how many people it was, my first thought was, "I really must buy another shelf for our oven." Currently we only have one and I think we can all agree that there's no way you can cook for 11 people with one shelf!