I use it quite often when I'm talking. Then again the particular area I'm from has a bit of a reputation for bastardizing many other contractions such as can't, don't, won't and yes even ain't.
Can't = Car
Don't = Doe
Won't = Woe
Ain't = Ay
I use ain't in place of 'am not'. So 'I am not doing that' changes to 'I ain't doing that'. Typing it out just looks odd and out of place amongst fully formed sentences. It's funny, because were that sentence being delivered vocally it would likely lose any sound of intelligence: 'I ain't doin' that!' as I have a habit of dropping g's.
Can't = Car
Don't = Doe
Won't = Woe
Ain't = Ay
I use ain't in place of 'am not'. So 'I am not doing that' changes to 'I ain't doing that'. Typing it out just looks odd and out of place amongst fully formed sentences. It's funny, because were that sentence being delivered vocally it would likely lose any sound of intelligence: 'I ain't doin' that!' as I have a habit of dropping g's.