Just had mine a few weeks ago and yes i played at my own party. We booked a regular gig at our favorite pub some time ago and we had the choice of dates as we are one of their favorite bands. The gig was on a Saturday night the day before my birthday. It does sound a strange idea but it was something i wanted to do. I also wanted to celebrate with some musical friends and have them as guests. The idea was also to get a few bass player friends up so i could take a few songs out so i too could watch the band. As it was the summer holidays a few couldn't make it but there was enough variety with drummers, vocalist and a bass player. It was quite a party as well as a gig. Needless to say i got quite drunk as i was kept topped up with JD.
We have to do it all again in December as it's the guitarists 50th!