playing friends with very different scores


Easy. Find friends like me who don't care as much about rating and will play just about anyone in unrated live chess
If your friends want more of a challenge, chess.com also has "balanced game" which is basically piece odds, but that seems kind of overpowered to me still. You could also verbally agree to have them play an inferior opening or some other 'handicap' to make it more interesting if the ratings are extremely far apart.