Several people have asked what "It's a big enough umbrella" means, so I guess I should explain. It's from the Police song "Every Little Thing She Does Is Magic", although Sting uses it in a couple other songs as well. The whole phrase is "Do I have to tell the story of a thousand rainy days since we first met? It's a big enough umbrella but it's always me that ends up getting wet." That whole phrase is a little depressing, so I just took a bit from it and I think it changes the meaning to sort of "everyone's invited". I didn't really choose it as a title for any particular reason. I just had to choose something and it's one of those lyrics that is usually floating around in my head.

And I dare someone to get one of these: