Atomic Underground Lounge Great Falls

Atomic Underground Lounge Great Falls We're a speakeasy lounge ... a mixture of an Atomic Bomb Shelter meets a classic 70's cocktail lounge meets your Grandma's basement.

If it didn't exist in 1977 you can't find it here. Classic cocktails and beers. Open Wednesday-Saturdays at 4pm.

In the basement of the O'Haire Inn. Open Wed-Sat starting at 4pm. Enter from the back of the Inn through the metal gat...
09/16/2026

In the basement of the O'Haire Inn. Open Wed-Sat starting at 4pm. Enter from the back of the Inn through the metal gate. Serving the classic libations of the 1970's.

BE THE COOL KID THAT BOOKS THE ATOMIC UNDERGROUND LOUNGE FOR YOUR COMPANY HOLIDAY GET-TOGETHER! We've got some dates le...
09/13/2026

BE THE COOL KID THAT BOOKS THE ATOMIC UNDERGROUND LOUNGE FOR YOUR COMPANY HOLIDAY GET-TOGETHER! We've got some dates left open for private events in the Atomic. Up to 48ppl. For more information text Donnie at 406-590-1860 or email Sandi at [email protected].

09/11/2026
BE THE COOL KID THAT BOOKS THE ATOMIC UNDERGROUND LOUNGE FOR YOUR COMPANY HOLIDAY GET-TOGETHER! We've got some dates le...
09/06/2026

BE THE COOL KID THAT BOOKS THE ATOMIC UNDERGROUND LOUNGE FOR YOUR COMPANY HOLIDAY GET-TOGETHER!

We've got some dates left open for private events in the Atomic. Up to 48ppl. For more information text Donnie at 406-590-1860 or email Sandi at [email protected].

Address

17 7th Street South
Great Falls, MT
59401

Opening Hours

Wednesday 4pm - 11pm
Thursday 4pm - 11pm
Friday 4pm - 11pm
Saturday 4pm - 11pm

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