Larissa is right. It DOES take a while to get things rolling.
The first Halloween party I threw, had about five people.
(Most of them showed in street clothes with the excuse "I'm
dressed as a scared person", or something like that. We see
that the zombies got to them BEFORE they made it to the party,
eh? Totally brainless costume planning.
But these were my closest friends. So it was great anyway.
The next year, I had more guests, because my friends did nothing
but talk about "last year's party". (I love my buddies!)
Every year, my guest numbers grew & grew. The party got bigger & bigger.
This year, I can't feed everyone, or provide drinks, so it's turned into a
"Bring your own "booze" and a covered dish bash. I'm just providing the
atmosphere. Thing is everyone wanted to bring food to share. It was
very hard to prevent them from asking, so I sort of caved in. On the plus side,
I can now use the money I was going to use for party food for more decorations.
So it all works out.
Wishin' you the best of luck for your bash, and take pictures to
rub in the faces of those party poopers.
Last year I invited 30 people, 20 said that they were definitely coming and do you know how many people I ended up with.....? 12, including ME! lol! Shocking, I know, and I was originally a bit disappointed by the people who hadn't bothered to turn up (or let me know ..) but then I realised that the people who did turn up were what mattered, and they made it a great party, despite the small crowd. The people that turned up were also people that I had been talking to about the party for a good month and a half before I did it, so plenty of notice (and plenty of reminders) definitely helps 
) So that's pretty much the only thing that's been confirmed so far. But if anyone shows up, I'll have them take a page out of I B's book, and do nothing but talk about "last year's party" 
and we all have a great time!!