This place was awesome! Had dinner in the area and was searching around for a cool cocktail bar to check out afterward. Found Le 4e Mur on Yelp and found my way to the dark, unmarked entrance that was a great start to the speakeasy experience. Had to wait a little while to get inside (it was a busy Friday night), but once inside we were seated promptly.
The ambiance inside is awesome! They do a great job of limiting the crowd inside so even when it is busiest, there is still a relaxed vibe inside and it doesn't feel overwhelming.
I had the Bubble Potion, the size was very large and it was delicious. Girlfriend had the strawberry mule, also great with taste of fresh ginger. Prices were a bit steep, especially compared to some other similar bars I've been to. Overall awesome experience though and would love to come back!