Humbead's Map Of The World, which suggested that Berkeley, CA and Cambridge, MA were right next door to each other, was not so far wrong. Anyone not in that nexus got their information a little bit later.
This ad is from the El Paso Herald-Post of Friday, May 9, 1969, advertises the Deep Green at the Kingsmen Lounge. They are described as "fabulous" exponents of "The San Francisco Steppenwolf Sound." It is easy to look at this from the perspective of San Francisco or Chicago and chuckle at the naivete of local rubes who didn't realize that Steppenwolf were a bunch of Canadians who lived in Los Angeles, who only had a peripheral connection to the so-called "San Francisco Sound," which in any case was some years prior when the band was called The Sparrow.
El Paso wasn't a place for hippies, and the Deep Green were probably the most hip guys in town, with all the latest records and hot licks to boot (Texas doesn't take kindly to second rate musicians in any genre). Its not their fault that the club they played at needed to push the latest California band to make them sound cool. They probably played a smoking version of "Don't Step On The Grass, Sam," which was pretty dangerous stuff for 1960s Texas.
The location of the venue at 3626 Doniphan Drive (at the intersection of Racetrack Dr), is just between Interstate 10 and the Texas-New Mexico border. At the same time, it is just about two miles from the Mexican border, near Jaurez. At the time, it was probably a hopping joint. According to the Google Satellite photo, no buildings are currently visible at the site.