The location was the Sugar Club, the intimate Dublin music venue a stone’s throw from St Stephen’s Green. It was July 2015 and, on four separate occasions, crowds gathered to witness a Tommy Tiernan show with a difference. Rather than deliver the stand-up comedy that made him famous, he was presenting a new, one-hour radio programme for 2fm in front of a live audience. The plan was to interview two people per show, but under the unusual premise that he wouldn’t know who they were until they walked on stage. The idea, dreamt up by Tiernan himself and executed by...