Google is now displaying additional details about hotels and B & B in the Local Stack and Knowledge Panel. It is not at all clear what source Google is using for this data although early money is on that seems to have embedded themselves into the booking tool. Several other oddities are that Google seems to have the data in the expanded Knowledge Pack but doesn’t always display it as in the Hyatt above. Note too that if the third listing displays the amenities they seem to get cut off in the main search result display. The amenities also show up in Maps when you roll over the pin. Get the full story at SEO Roundtable and Blumenthals Read also Google's help document on Hotel Amenities that lists the various sources where they receive the hotel amenities information from.