This was Bob Brooks's second Seven Seas location. The first was in Hollywood.
This pre-tiki bar was located in Las Vegas at the Nevada Biltmore, but it was short-lived, lasting just from 1942-1944.
From the Las Vegas ashtray website:
“The Biltmore was built on this corner in 1942 by Bob Brooks. His single-story resort on 17 acres -- featuring a hotel, cottages, showroom, casino, restaurant, bar and pool-was Polynesian-themed, a motif he'd brought with him from his famous Seven Seas restaurant and lounge in Hollywood.For nearly three years the investment paid off, thanks to business from the expanding Army Air Field at the north end of town. But by the end of 1944, Brooks saw the Biltmore's future dimming and sold the resort. It changed owners (one of whom was famed bandleader Horace Heidt who later opened the tiki-themed Horace Heidt's Magnolia Estate Apartments) until June 1948, when four well-known members of the white community purchased the resort as the Nevada Biltmore Hotel Corporation.“
Photos below show the Biltmore exterior with neon tubing sign for "Seven Seas Room" unlit in the daytime (see wide and then close-ups of sign).