In a way that is like a showman, someone who is very good at entertaining people.
This word makes people think of someone who is very good at making people happy or excited.
Examples:
He danced showmanly on the stage.
The clown acted showmanly to make the kids laugh.
She sang showmanly and everyone clapped.
The monkey walked showmanly and made everyone laugh.
The magician showed his tricks showmanly to the crowd.
The actor performed showmanly and everyone loved it.