Butte is full of casinos and lounges just drive around and you'll be able to find them. Some of the more historic ones would be the M&M and Irish Times Pub in Uptown Butte. But some of the more modern ones like, Uno's Lounge on Harrison Ave still provide excitement and fun.
Maloney's Bar - Don't know if it would be considered traditional 'nightlife', but there are not categories in VT for taverns.
Established in 1871. There is a big green shamrock inlaid in the sidewalk in the entryway. The prize for the World Series baseball pool was a rifle with a scope.
Dress Code: Anything, including hunting attire.