#6 - The Biography Of ???

Riddle: If someone were to write a biography about us, the following could be reported: #1 - All athletes, to reach their peak performance, must do me. #2 - Behind a groom is a best man, but behind a bride, you will often find me. #3 - James West and Artemis Gordon used me as their Secret Service headquarters on T.V. #4 - Edward Kennedy Ellington highly suggested you take this lettered thing to get to Sugar Hill in Harlem. #5 - Characters Floyd Smoot and Charlie Pratt honorably conducted themselves on one of me in the town of Hooterville. Based on the biographical information above --- Who/what are we?