SE search wit or witout doorman?

For doorman, click Advanced Search, check the Amenities box and then check the Doorman box.

No way to specify what it doesn't have, as far as I can tell.

That's something I've always wanted to see real estate sites in general make possible: the ability to search for the *lack* of something. Zillow does it too -- there are check-boxes where you can indicate that you absolutely must have, say, a pool, and if the place doesn't have a pool, don't bother showing it. But there's no way for people who think, "I place no value whatsoever on Amenity X, so if a house or apartment contains it, it's going to be overpriced for my purposes; therefore don't show me anything containing Amenity X," to eliminate such apartments.

Wit and witout, is this for cheesesteaks?

NWT: I myself tried searching that way also ('advance search'), but didn't find it to be terribly accurate.