Don’t wait until you can’t attend the party. How many times are there when you get all your old mates together in the same room? Probably not since your wedding. Well now’s the chance. Don’t wait until you are dead. Conduct your own wake now. Chose the music, what you want to say about yourself, the venue!
Only problem is that if people know you aren’t actually dead will they come to the wake? Avoid the embarrassment of finding out who your real friends are by suggesting they have their own wake at the same time. That way they will definitely want to come.