Minstrel was shown to love mainly wine and music. He is shown to be drunk so he probably very often becomes very, very drunk behind King Stefan's back.
As King Stefan and King Hubert wait for Aurora to return, Hubert feels like celebrating and has the Minstrel serve them wine and play music for them as they sing. He secretly helps himself to a few drinks and ends up getting drunk and falls asleep under the table with his feet sticking out and his head inside the mandolin.
After the fairies put the kingdom to sleep, Merryweather spots him after regaining consciousness, only to be put back to sleep by a wave of Merryweather's wand. He isn't seen again for the rest of the film.