David: An eid echad makes it kasher, an eid echad makes it treif. There’s no chezkas kashrus here – it’s a treif hotel!
BLOW THAT WHISTLE! If you don’t, lifnei iver lo sitein michshal.
I was told by many, many people, NEVER go to a hotel that isn’t certified by a national kosher organization – if it’s a minor organization, or simply the town vaad, there’s a good possibility they will be scared to speak out, as hotel certification is a large part of their income. I’m referring especially to those hechsherim that you never see on food, but come pesach, they’re certifying tons of hotels.