You shouldn't invite yourself to events.
Jack and Jill are planning on attending a party this upcoming weekend, while John eavesdrops on their conversation, unbeknownst to them.
John wants to find plans to fill his empty weekend.
John waits until a conversation is being had between all three of them, and asks them if they have any plans for the weekend.
John buts in and asks where his invite is.
Jill tells John about the party and both tell John he is more than welcome to come if he has no plans.
The atmosphere becomes tense and awkward as Jack and Jill try to think of excuses for why they may not end up going.