Google said on Google+ that they are now randomly polling Google Maps app users when they are viewing a place listing about that place.

If you open the Google Maps app, search for a place to eat or hang out, Google may pop up a poll or a “riddle” as I think they are calling it.

The questions asked include:

Is this place good for groups?
Is this place popular for dinner?

I am sure there are many more questions but Google offers three answers, Yes, No or Not Sure.

Here is a picture:

Linda said in the Local Search Forums that this gives you yet one more reason to “focus on customer service as well as SEO.”

Forum discussion at Local Search Forums & Google+.