If you are looking for something more for your event, why not consider some of these suggestions. 

Bollywood

String quartet / trio / duo
Mixed ensemble (e.g. violin, piano, tabla, flute)
Solo harp / harp + violin

 

Classical

Solo piano 
String quartet / trio / duo
Solo harp / harp + violin

 

Pop and Jazz

Solo piano
Piano and violin
Piano and saxophone
Mixed ensemble (e.g. drums, guitar, piano, voice)