If your conditions permit...it's okay for you to be a bar owner...If not, I suggest you do some other work...I can analyze it for you. The nightclub has turbid air and a lot of noise. If In the hall... don't say you don't smoke... you are also smoking other people's second-hand smoke... the smoke emitted by the cigarette machine that creates the atmosphere... don't inhale it thinking it is fragrant... it may not be good for the human body. It is dark You can't see the dust floating everywhere due to the vibration of the subwoofer. To put it more unpleasantly, after a night, wipe your nostrils with a tissue to see what color it is. Also... many bars will A fight or something like that happens... if this happens... if you are involved in it... it will be inevitable... Generally speaking... a bar is a place where dragons and snakes hang out... to have fun. Just have fun... I don't want to work in a nightclub...