Well, I have the opinion that when you get together a group of people with some common interest they would probably have interesting (for them) conversations about things both related and unrelated to that common interest.
Comment on Re^5: [OT] How about an Off Topic Section?
An OT section is not necessary for that, because Perlmonks has been allowing people of a common interest (Perl) to have related and unrelated conversations longer than you have been a member.