Disco Nixon

Disco Nixon Marilyn Werden and David Arenson (Fireside, $10.95) Who said, ''When Hugh Hefner comes out here with a cottontail attached to his rear end, then we'll have equality''? Why did Granville Bishop shoot his TV 17 times in 1973? The authors have gathered hundreds of '70s trivia questions-on music, TV, movies, politics, sports, and everything else that happened in what David Cassidy called ''the last decade dedicated to having a good time.'' Who changed his registration to Democrat before being imprisoned, because he could not stand the idea of a Republican going to jail? Who said, ''If I'm saving the whale, why am I eating tuna fish?'' Like the '70s, Disco Nixon has little substance, but it's wildly entertaining. B+ -D.A. Ball