Newspaper advertisement for "Always Elvis", a convention held for fans of <a href="https://en.wikipedia.org/wiki/Elvis_Presley" class="extiw" title="w:Elvis Presley">Elvis Presley</a> at the <a href="https://en.wikipedia.org/wiki/Las_Vegas_Hilton" class="extiw" title="w:Las Vegas Hilton">Las Vegas Hilton</a> in 1978.
Unclear
Los Angeles Times, June 25, 1978, Calendar section, page 81, via <a rel="nofollow" class="external text" href="https://www.newspapers.com/clip/23381644/always_elvis_advertisement/">Newspapers.com</a>