Perhaps, but your advice required the ability to successfully start conversations, since you were suggesting to talk to random people

Well, the entire topic of the original post was contingent upon already being in a situation of engaging in small talk with someone. The LW meet-up, for example. If you are already able to start conversation with someone, but wanting to skill up in steering the conversation into interesting avenues, Kaj Sotala's post should be very helpful. Being able to make small talk does not at all imply skill in having interesting conversation.