Hard to comment without being anecdotal, but I exclusively look for business hours on Google maps or Yelp. If I'm searching for a type of business ("hm, is there a bakery near me that's alf-decent?") then I use Yelp. "How busy is <restaurant x> right now?" then I'd use Google Maps. Yelp and Google both link to a businesses' website meaning I don't ever expect to log onto Facebook to check for basic business info. Facebook definitely does have some benefits for businesses such as notifying of promotions and such, but I honestly don't think I've ever thought of FB as the first stop to get business info. It's like a last resort to check for a FB page for me.