I don't feel attracted to sites like these, or even FourSquare, because they're so impersonal. It's like the yellow pages on a map widget.
You gather reviews and Michelin stars and stuff, which is probably good for you and some target audience, but I don't care about that stuff.
Michelin guide judges seem to belong to some other world of foodie snobs who order stuff I would never order and don't care about the aspects I do care about, like price, ease of access, humility, coziness, friend recommendations, etc.
When I'm out and about, or when I'm planning an evening, I'm not interested in seeing all possible options. In fact that just makes me more confused because now I have to look at 50 different fact boxes and try to decide on dinner based on a bunch of facts and stylized pictures.
The only similar site I've used and actually liked is SpottedByLocals, which is more labour intensive because it is made by locals and expats who go to places, take their own pictures, write their own reviews (with a bit of personality), etc.
So on SpottedByLocals I get an interesting "curated" subset of restaurants that I know have been visited by what I think of as "actual humans" and who provide actual on-the-ground information instead of generic overviews.
Thus, for me, the site would be way more interesting if it only had 12 restaurants that you have been to, with one or two Instagram pictures each, a little tip ("I loved the hummus"), and maybe something about what's in the neighborhood.
Metaphorically it's like if I were to ask a friend "hey, where should I have dinner in London?" I don't want 200 restaurants, I really only want one, as long as it's decent.
One random idea would be to Tinderify the user interface. Instead of making me hover over dozens of map pins, it would just ask "does this look good? y/n."
Or maybe a kind of 20 questions approach, so I would say: "Nah, too fancy. Nah, too meat-based. Nah, too far from Soho. Ah, yes, that place looks good."