Possible Clues:

• Sierra Nevada's Atomic Torpedo, e.g
• Beer initials that can follow "double" or "triple"
• Letters after "New England" or "West Coast," at a brewery
• Hoppy brew option
• Tavern initials
• Letters on some beer cans
• Letters after "double" or "hazy," at a bar
• Lagunitas brew, for short
• Hoppy pub initials
• Light-colored beer, briefly