When introducing chess to friends, I have a hard time trying to figure out what difficulty level to use.  How easy should one go on a friend who is just learning.  On one hand I don't want to make them feel like I am taking it too easy on them.  On the other hand I want to give them a chance to explore and enjoy.   At what point to suggest that they made an error, after the game, during the game?   I could use some advice.  Thanx.

let them have fun first, and if they show more interest, then start them into the studying of chess.

Me: Hi friend. This is Chess. Chess, meet my friend.

Friend: Is this some kind of joke?

Me: No joke. I just wanted you two to meet and see if you got along together.