I'm a great fan of humourous verse. Humour can be used to deliver serious messages without boring the audience, or it can stand alone for pure entertainment. Wendy Cope is my favourite humourous poet, she is very entertaining and many of her poems have a serious point too. Many performance poets use a lot of humour, many of them tour the comedy circuits. Many performance poets are a bit too aggressive in their delivery for my tastes, though Ash Dickinson goes for the rambling surrealistic route to humour and is often hilarious.
I don't write humourous verse. If I try it comes out false. However I have written some poems that have drawn laughter from audiences when I have performed them in public. One of these poems can be read over on my Alter Ego blog. Please feel free to read it and let me know whether you think its funny or not!