You don't really "coach" it. It's not a sport. Generally, music teachers are in charge of a school's glee club.
Idina Menzel or Shelby the Vocal Adrenaline's (competitive glee club) coach
Jazz Hands
Will Schuester invented the glee club. He is the glee club teacher and the Spanish teacher.
Cheyenne Jackson plays the male coach of Vocal Adrenaline. He is the one who is a part of Sue's club thingy to destroy the glee club, he hit on Holly Holiday, and he lied to Will in the New York episode.
No, Coach Bieste is not a lesbian.
Mendelssohn Glee Club was created in 1866.
Harvard Glee Club was created in 1858.
Virginia Glee Club was created in 1871.
Morehouse College Glee Club was created in 1911.
No its is not its just a regular show about a (ludicrously unrealistic) glee club.
http://www.fox.com/glee/
Glee is based on a high school in America which has a similar "Glee club" as in the program. Most of the characters are based on real people, such as Sue Sylvester-who is the cheerleadering coach-she is based on a lesbian coach in real life.