Review sites: counter service vs table service

Why is it so hard to use the major restaurant review sites (Yelp, TripAdvisor, etc.) to search for counter-service places, as opposed to table-service places?

This seems like a pretty basic differentiator, and nearly every time I go searching for something in a new place, I have one or the other in mind. Yet, I haven't found a good way to distinguish on any of the sites, besides filtering by, say, price level and looking at every listing individually.

Any suggestions?