The best way to start a band that is sure to work is to become good friends with other band members before you actually start playing together as a band. This way you all get used to each other and spend a lot of time together anyway. If that is not possible or you just think that is a stupid idea, the next best thing is to set up a regular schedule and stick with that.
As for the best place to play, in my town local bands usually play at their school dances. I don't know how good of an idea this is because I never go to dances, but at least it's a thought.