Crack Mayor Rob Ford -- I'm Done Partying ... I Got an Election to Win!!!

Crack-smoking enthusiast and Toronto mayor Rob Ford actually believes he stands a chance at re-election this fall -- in fact, he claims he's given up his partying ways ONCE AND FOR ALL ... to focus on politics.

Shortly before his train wreck "Jimmy Kimmel" interview Monday, Ford spoke to fans outside his Hollywood hotel -- saying his party days are done.