There are brick and mortars popping up everywhere, but as has been mentioned, e-cigs and e-cig products are such a new industry.... they're doing it against the odds that they won't be crushed out of business once the FDA figures out how to do it.  
I live in a town that has about 6 brick and mortars that sell nothing but e-cigarettes.  Vapor Kings has three stores in my area (Tulsa, OK)...and are opening another one in Stillwater, OK in early February.  I go there a lot. (They have vape lounges where we can just get together, test juices, and socialize.  It's awesome.)  They are making money hand over fist.  They have been an on-line business for about 4 years now, and have had the stores for a year and a half or so.  They have grown every single month....the main store has expanded twice already.  They're catching on.  It's just slow going for a brand new industry.