An important part of English ceilidhs is the "caller" who instructs the dancer in the next dance. An experienced ceilidh caller will have a good understanding of the mechanics of the tunes and a deep knowledge of regional dances from the UK and beyond. They will confer with the band about what type of tune to play for the dance. This aids the selection of the right dance for the right audience. This skill is so sought after in the south of England that there are callers who are famous in their own right. However, many bands have their own caller, often also an instrumentalist; some have two.