Y and IES

I saw this on the door of a hotel in downtown Vancouver (Budget Inn Patricia Hotel - 403 East Hastings Street). This is a classic example of the plural after "y" rule. The rule says that if a word ends in "y" with a consonant before it (e.g. fly), you drop the "y" and add "ies" (e.g. flies). If the "y" has a vowel before it (e.g. boy), then you just add the "s" (boys).