This would be a great poll, but there are a few other possibilities:

1) A friend instructed me (my choice)
2) Instructor not from club
3) I got somebody at the field to take me up each time.
4) I went for a week to flight school
5) Learned on sim, didn't need human instructor

I would really be helpful to break down the numbers on the self-instructed:

1) Self-instructed, park flyer
2) Self-instructed, glow trainer
3) Self-instructed, other

Also, the right place for the poll would be the club house, since many experienced pilots may not hang out on the Beginners forum.