How far have you pursued a conversation with a "wrong number"?

My friend “Bob” dug up the number of an old friend of his who’d promised to help him fix his car. The number was no good anymore, but the guy who has that number now, coincidentally, fixes cars and was willing to help Bob fix his.

Where I come from, you don’t get past, “Hi, is Irving there?” “No, sorry, wrong number.” (Hangup.) I asked Bob, “How do you end up having conversations with wrong numbers?” I guess for him, it just “happens.”

How are wrong numbers handled in your household? Do you ever chat them up? Ask them things? Or would that be considered intrusive? Is Bob unusual?