Thank you, flattop for sticking up for us chick singers who don't play another instrument. Or maybe we do but we can't sing and play at the same time and the singing is better anyway.
Some people think that since "we can all sing," that singing doesn't take any practise. All I know is I've been taking voice lessons for years and it's my voice that gets the compliments, not usually the others that I often sing with.
As to the issue of the thread, Gervase got it right, if there's no joy, there's no bloody hope. In a band, everybody must be pretty close to the same page in attitude or it'll never work.
Good luck.