According to a letter filed at the time requesting zoning approval to enclose the jalousie window area of the above restaurant, the company (Florida Oyster Company), located at 768 Dania Beach Bouevard, Dania (phone FR3-5307 Dade or JA2-1469 Broward) had New England Oyster Houses at the following locations, in addition to the above location, at the time:
280 Alhambra Circle, Coral Gables
3906 NW 36th Street, Miami
12727 Biscayne Boulevard, North Miami
760 Dania Beach Boulevard, Dania
900 SW 24th Street (Rt. 84), Ft. Lauderdale
2860 East Sunrise Boulevard, Ft. Lauderdale
3100 N. Federal Highway, Pompano Beach
1701 N. Federal Highway, Boca Raton
7400 S. Dixie Highway, West Palm Beach
7230 N. Tamiami Trail, Sarasota
I'm fairly sure that more locations were added, including one on W. 49th Street (Palm Springs Mile) in Hialeah, for the rest of the 60's and into the 70's. At some point in the mid-70's the Red Lobster chain expanded into South Florida from upstate and had to have been a factor in the New England Oyster Houses losing market share and eventually disappearing.