If you want to do boxing, enjoy dancing, and stop smoking all at once, I recommend you b-monster.
“b-monster” 45 minutes nonstop boxing fitness studio
b-monster is a new form of boxing fitness studio in Tokyo.
There are three features of b-monster.
1. You can do boxercise with big volume dance music as if you enjoy dancing.
2. You can do boxercise in dark room so that you are concentrate on your exercise.
3. Cool instructor makes us burning with rysmycal voice and yell.
b-monster have 4 locations in Tokyo.
Omotesando, Ginza, Ebisu, and Shinjyuku.
45 minutes classes are always scheduled from 7 am to 11pm.
So you can enjoy boxercise before or after working time.
You can burn off 500~1000 kcal through just a 45 minutes exercise.
Here is the link in Yelp for b-monster.