Yes, these offices certainly are not distinct, if the nomination is just for said office. Permanent and Distinct should be reworded, as there are nominations that are permanent but not distinct, and vise versa. So, while these offices may be permanent, they may also be pretty common, not being anything special or unique that makes them good Wayspots.
Generic business can be used on nominations that are not chains. Some examples to me are hardware stores, auto dealerships/auto shops, furniture stores, etc, and all being locally/independently owned. Unless the nomination can convince me that these businesses are great places to socialize, exercise, and/or explore, I most likely will reject as a generic business.