The Hemlock music/performance room is a physically separate and (more or less) soundproof space from the rest of the bar. While it's always free to get into the bar itself, there is almost always a cover charge to enter the music room. We'd describe it as "intimate". Or even "cozy". But certainly not "cavernous". Personally, we think it sounds great in there. Maybe even awesome, dude. Objectively, it's one of the best rooms in the city for experiencing live music.
(www.hemlocktavern.com)