Is humour self-indulgent?

Having attended a Tripod concert the other night as part of the Adelaide Cabaret Festival. I was left wondering...well I don't know what I was left wondering...it all seemed a little self-indulgent. And pretty undisciplined. The combination of the two..self-indulgence and lack of discipline ...was almost too much to bear.
I suppose humour is always fairly self-indulgent, we are inviting people to laugh at us, or self-disclosing in such a way that people can come in and let go. "Tripod"are sometimes like this, but not so the other night.
Already I can feel the cloud descending on this post...there is nothing less funny than people talking about what is funny!!! It's one of the reasons why those debates "Does God have a sense of humour?"don't usually work...also because God is by definition not self-indulgent, or alternatively so unknowable that you can't really laugh at something you don't understand.
You can laugh at church people though:

HOW MANY CHURCH PEOPLE DOES IT TAKE TO CHANGE A LIGHTBULB?

A) Charismatic: Only one - hands are already in the air anyway.

B) Roman Catholic: None - they use candles.

C) Baptist: Change??!!??!!

D) Pentecostal: Ten - one to change, nine to pray against the spirit of darkness

E) Presbyterian: None - God has predestined when the lights will be on and off

F) Anglican: Ten - one to call the electrician, and nine to say how much they like they old one better

G) Mormons: Five. One man to change the bulb, and four wives to tell him how to do it.

H) Methodists: At least 15. One to change the lightbulb, and two or three committees to approve the change. Oh, and also a casserole.

I) Unitarians: We choose not to make a statement either in favour of or against the need for light bulbs. However, if in your own journey, you have found a light bulb that works for you, that is fine. You are invited to write a poem or compose a modern dance about your personal relationship with your light bulb, and present it next month at our annual Light Bulb Sunday Service, in which we will explore a number of light bulb traditions, including incandescent, flourescent, three-way, long-life and tinted, all of which are equally valid paths to luminescence.