Ironically, the Saracen's Head does have a colloquial name. For
generations it has been known as The Napper. However, I cannot imagine
that many contemporary Dudley folk use this term. Such names only seem
to survive when it is a good old drinking den of some notoriety - an
example in Dudley town centre being The Cow Shed at the top of
Wolverhampton Street.
Cheers Kieron