I've been there, it is smoke free, no extra charges.
There were only 6 taps I've visited in March, but they said they'll provide 8 taps of beer as this pub's name.
Let's check it!
SQH3 #126 神保町 Jimobocho
日時4月 11日 (土), 19:00 ～ 22:00
場所BEER PUB 8taps, 日本, 〒101-0051 東京都千代田区神田神保町１丁目６−１ 101 0051 (地図)
説明Toei Mita, Shinjyuku, Metro Hanzomon lines (A2) Palace run. Meet up at Ume-no-yu. We'll go new beer bar "8taps" after taking bath. Smoke free, no extra charges. Welcome to join just for drinking. Please be there 21ish.