If FDIC is one of several inclusive criteria defining an institution where CC is prohibited, then a check cashing business would not be considered such...IMHO. To have FDIC you must accept deposits, and these businesses are only loaning money.
On a side note, when I worked as a consumer credit counselor18 years ago, these types of "check cashing" businesses had a very hard time collecting on bad checks. The attorney (general, county, state?) would resist filing charges against people who wrote the checks. Normally when a check is written, the legal assumption is that the check is backed by funds in the account. However, the checks written for a loan were accepted knowing that there was not sufficient funds in the account. Not sure how/if that has changed over the years.
Fly