As far as Rabbinical certification goes there are other factors besides the kosher status of the food alone that would bar and establishment from receiving it. First and foremost an establishment that is not closed on the Sabbath could not receive an Orthodox kosher certification. That of course is a no brainer. However it goes even further. An establishment that has entertainment featuring mixed dancing where there is physical contact between men and women can not be certified as kosher. An establishment that has entertainment featuring female vocalists can not be certified unless it caters to an all female clientelle. A resort that features mixed swimming (men & women in the same pool together) can not be certified. We even had a recent case where a friend of ours who is Orthodox and had a fast food restaurant could not cater in one of the local synagogues because she did not keep her hair covered at all times, despite her food being Glatt (the strictest degree of) Kosher.
SOL ZELLER