Family party coming up and we're struggling to find a venue.
We have a small house but our garden is of an ok size.
Contemplating offering our house for the do. (no-one else has been very forthcoming!)
I could hire a gazebo and hope that most of the guests stay outside predicting a glorious sunny day!
There are 3 children in the immediate family.
Guest list is around 50 people - without children.
Guests children = around 10. All of running around age 
Our DC would be in bed by 7.30pm - so from a selfish point of view we could happily party in our own house for the rest of the evening if the little monkey stays asleep!
Would it be rude/unfair to only invite the children in the immediate family? Would the other guests feel put out or would they prefer a child free night out? (if it helps you decide, we prefer child free parties where we can relax for the night knowing they are being looked after smothered! by either set of GP's 
Would probably start the do in the late afternoon.
Or is this a bad idea in general and should I continue to help them find a venue?