I've *never* heard of the bar closing earlier than the restaurant. Like you said, if there's any difference in closing time, it's the other way around.
I've only done the vitamin store audits for Shared Insight, and I've only done that three times. All three times I've seen it offered since joining S.I. My experience with them has been good. Minimal communication, but always when/what needed; and paid right on time according to their posted pay schedule.
Practitioner of the Nerdly Arts.