Great niche product and MVP. I can see how more activities can be integrated/offered in the future to grow the business.

Yelp for karaoke? I like the idea of creating info that others don't have. Are the problems you are solving large enough?

Not sure thid idea will fly. Kareoke is already a category on Yelp and Posse.

Definitely applicable for the Asian market, but kind of difficult to differentiate from existing services like Yelp etc.

4Sq does most of this. Niche of a niche although they can do other verticals, easy to replicate.

User generated data will be hard, good strong niche focus. Need to have clear communication on your USP and product, took a while to get out the "how it worked"