What 'fusion' actually means
Fusion uses the rhythmic structure (laya), hand gestures (mudras) and posture vocabulary of classical dance, then choreographs them to non-classical music, film tracks, electronic music, devotional remixes. The classical structure makes the piece readable to traditional audiences; the modern surface makes it readable to general audiences and judges.
How fusion is choreographed
A choreographer first picks the music's rhythmic count, builds the floor pattern (entries, exits, formations), then layers the upper-body vocabulary. Dappankuthu, Bollywood, semi-classical and folk are common building blocks. The hardest part is keeping the synchronisation flawless across a group of eight to twenty dancers.
Where fusion belongs
Fusion is the dominant style at school cultural festivals, inter-school competitions, college fests, weddings, corporate cultural shows and televised dance reality programmes, anywhere the audience is mixed and the runtime is short.