When looking at online store locators for certain chains (mostly the cheap-eats variety), I notice many of them have a few strange locations in areas far away from their "base".
For example, Del Taco is entirely in the western US, but has one store in Detroit and one in Georgia. Another example: the Coffee Bean and Tea Leaf coffee chain has tons of locations in L.A., but just one lonely location in the Bay Area, on Fillmore St. in San Francisco.
Anyone know what's up with this? Why do chains open these far-flung locations in the first place? If they're successful, why don't they expand in those areas?