What songs do young trot singers without any hits sing at their own concerts?

I'm curious what kind of songs trot singers who hold concerts but don't have any hits of their own use to fill their sets.
I'm sure they have fandoms, so I'm not worried about ticket sales, but if they don't have hits and just sing other people's songs, that feels a bit...
On the other hand, it makes me think of Im Chang-jung, who has so many hits that even a medley of them wouldn't be enough.