Seems a daft idea to me. If English is your first language and you want to communicate with Hindi speakers, learn Hindi. And vice versa. To deliberately muddle the two languages doesn't help anyone.
For a minute I thought it might have been Portsmouth Uni but it is just a sixth form collage. Can you actually take Hinglish as a proper subject or something?
I've worked in banks and life companies most of my life and I've never heard of it. I met a lot of Indians and normally their English is excellent, they tend to talk to each other in English when they have different Indian Languages.
Which business community? Certainly not the international business community. I've never heard of it. Yes, it is just pandering. While they're learning this they might as well be learning English - which really is widely spoken in the business community.
Ridiculous. Either learn a language, or don't. If one wishes to adopt the odd foreign word into your own language then that's a different matter. Umpteen erroneous versions of an established language (all pretending to be legitimate variants) is unhelpful; it merely devalues the original.
India has no end of languages which is why English is used by so many. Similarly to TTT I have spent 30 years in Banking with much of it working with Indians bother here and in India. They pretty much all speak impeccable English. Apparently many schools teach the classes in English.
But, if you are to learn another language then why not learn actual Hindi?
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