Possible Clues:

• Donna Summer hit
• Where many songs are heard
• Possibly another one in party, broadcasting
• 1979 Donna Summer hit ... or where it was heard
• Where people heard fireside chats
• Donna Summer '79 smash
• Summer hit
• Where 1-Down or 50-Across may be heard
• Donna Summer hit covered by Martine McCutcheon