There comes a point when many entrepreneurs ask themselves a big question: What comes next? For Niall Horgan, that point came after almost a decade spent turning Gym+Coffee from an idea dreamt up over brainstorming sessions with friends into one of Ireland’s best-known consumer brands.  So, Horgan stepped aside as chief executive and moved into the role of chairman. “I did feel shattered,” he says of the period before he stepped back. “I was questioning, ‘Do I have the energy to be doing this?'” When we meet in a busy Camden Street café in Dublin on a grey Friday morning,…