Possible Clues:

• D.J.'s, at times
• Toasters that talk
• Masters of ceremonies (abbr.)
• Speaker connectors?
• Lyte and Hammer, e.g.
• Intro makers
• Toasters at dinners
• Ones putting on a show, for short
• Some anecdotists
• 'Three ___ and One DJ' (Beastie Boys song)