Recruit Ian

 is an unmarked quest in Fallout.

Walkthrough
Go to the house in the northeast of Shady Sands, and talk to Ian. There are two ways of convincing him to join you. If your intelligence is 6 or greater, you can offer him "a piece of the action." If you pass a speech check, he will join you for free. Otherwise, you can pay him $100 to join you. Remember that stealing from your companions is not treated as a crime or hostile action. If you weren't able to convince Ian, give him the money and steal it right back. You'll get the same amount of XP, no matter how you do it.

This is not given as a quest by anyone, but it is something you can do for additional experience.

Reward

 * 100 Experience Points.
 * Ian as a companion.