The Dagbani Dictionary glosses simpa as a dance, and records gomna as, among other senses, 'leader of the simpa dance'. In Chernoff's 'A Drummer's Testament' (ch. I-18) the drummer says Dagbamba drummers beat Simpa but that it is not a Dagbamba dance: 'it is the Bassaris and the Chembas and the Kotokolis who are for those dances'.
The young people gathered in the evening to dance Simpa.