I've heard some strip clubs make girls work a few day shifts if they're working the night shift on the weekend, so it's possible to find prettier girls on the day shift. Depends on the area and club actually. I'd suggest you to visit tuscl website to see reviews of establishments. Western clubs in Japan are not open in daytime.
About drugs, i wish I could say drugs didn't exist in strip clubs but I can't. What I can say is there are girls who stay away from drugs and have a healthier approach to life. Not every girl you see is broken on the inside
Sometimes I see hostesses, strippers and escorts portrayed in a negative light here, and people quickly labeling them as having bad personality, mental disorders or being plain crazy. That's easy, chalking things up to a girl having bipolar disorder because she's a working girl, so she must be messed up in the head.
I did see my fair share of that, but I have met young women with a perfectly functioning brain.
I would recommend any girl who works in clubs to have a real life outside of the neon colored bikinis and black lights, make friends with people who have different professions & lifestyles otherwise the strip club sucks you in and you can't get out. It's a good income to support yourself through school or work on weekends to support your income but clubs in Japan will kill your liver with the alcohol if you work everyday for ten years. Have a plan B, it sounds cliche but cliches are the truth sometimes. It's fun working in the industry for extra cash, but if your income and future depends on it it's very harmful for your mind and soul.