Here's an example of how to invite your friends to a party, but with a twist: you're not inviting them to a party. Instead, you're inviting them to a meeting about a party that might happen, possibly.
Dear friend,
Are you free on Saturday? We might have a party. Possibly. If we decide to have one. But let's not get ahead of ourselves here. The point is, we're inviting you to a meeting about the possibility of a party. It'll be a meeting, not a party. Unless it's a party. But it might not be.
Best,
Your friend