Ok. Here's how I'm currently using Mellotron out and about in the wider world.
http://soundcloud.com/tdintbl/long-black-veils-rust(Wish the soundman hadn't had left the flute and mellotron so far in the back.)
I just joined this band a bit over two months ago. Met them at a local open mic night. They liked my flute playing. I mentioned mellotrons and organs. The band leader got excited, said he could use mellotron and organ work! I play mostly clonewheel Hammond. (vb3 is amazing. It fools me) I do put in the occasional melly bits and often flute bits. Even the odd harmony vocals and mandolin work.
If you like what you hear, like us on facebook.
Thanks.
-Sean