At our wedding, we didnt have anyone under 18 yrs old. (with the exception of maybe 5 people/kids) i think people are grateful to have a night w/o the kids, and this gives them an excuse. haha

also, keep in mind, a lot of people you invite probably wont be able to come. Count on the people w/in a two hour driving distance coming...but anyone further, ie: out of state friends/family, the likelyhood is that they will decline. we invited 250 people to our wedding, knowing at least 100 would decline, and thats what happend..we had 150 people.

also, if you are not close with some people from your hall, dont feel like you HAVE to invite them, just because you are in the same cong as them. Most people understand that everyone cant be invited.