[Caveat Emperor]

The sign ruling sets up a massive slippery slope -- if it is unlawfully discriminatory to post a sign that discourages people unable to speak english from going to the Inn (thus rising to the level of national origin discrimination), then does that create a duty for employers to have someone capable of speaking languages other than english in order to ensure that those of different national origins can recieve service?

If I recall correctly from classes, the EEOC has come out against rules which require speaking english only in the workplace, but I don't remember reading anything about policies towards customers.