What kinds of things are inappropriate when having fun?

1 Peter 4:3You have had enough in the past of the evil things that godless people enjoy—their immorality and lust, their feasting and drunkenness and wild parties, and their terrible worship of idols.

Fun is wrong when it is self-centered or indulgent, when it involves sinful acts, when it can easily tempt us into sin, or when it is hurtful to others.