Hugh Hefner wrote a $5,000 check in 1970 to help start NORML, now at 47 years old is one of the oldest marijuana legalization organization's in the U.S. Hefner continued supporting NORML for years, at times donating up to $100,000 a year.
Also, in 1978 he waged a public campaign to restore the HOLLYWOOD sign, getting 9 donors, plus himself, to sponsor a letter, to cover the costs.
H: Terrence Donnelly (publisher of the Hollywood Independent Newspaper)
O: Giovanni Mazza (Italian movie producer)
L: Les Kelley (founder of the Kelley Blue Book)
L: Gene Autry (actor)
Y: Hugh Hefner (founder of Playboy)
W: Andy Williams (singer)
O: Warner Bros. Records
O: Alice Cooper (singer), who donated in memory of close friend and comedian Groucho Marx, and who joked that he would also donate an "O" from his last name
D: Dennis Lidtke (businessman) donated in the name of Matthew Williams