Ahh Bollywood and how they break out in dance and song that makes musical breaks in American musicals look realistic. If you've never seen one it can be quite an amazing explosion and in many cases wonderfully random. E.g. Starting as a small picnic ending as a royal size wedding in a single scene.
This is definitely one of those things where each is his own. I personally don't care for it and it had to be purely dreadful in the early 80's. A Disco themed Bollywood flick? I'd almost watch Mamma Mia........ almost.