Would love to answer your questions.

Who would use? How big community you have in one area?

The population of Delhi alone is over 30 million. That's where the cafe could be opened. And when you know influencers like these personally - https://www.instagram.com/fabulous_feast?igsh=MTViZ2Nwcm0xcnQ2bw==, you don't have to worry about marketing either.

To run it you need experience

Absolutely. That's why I won't be the one running it. Check this out - https://maps.app.goo.gl/nJE1RPeRAezGz1Uk9?g_st=ipc
The owner of this cafe is the one who will help us out.

You didn't convince existing businesses to accept HBD then making new venture it will head to fail.

This is India and you cannot convince people to use HBD when they are used to UPI payments. That's why if we want to penetrate this market, we need to come up with our own outlet.

That's why I said it could be something that we can consider as the ROI on it will be much much better than most initiatives that have been taken so far.