Fellow Lisboa ravers, I need some tips about your nightlife culture

I will visit Lisboa tonight and will stay for 11 days. Need a few suggestions and tips from you:

1. Can you recommend me some good events/venues that I should go to? I'm mostly into techno music, but if the vibe of the place and people is great, I'm totally fine with softer music.
2. What is your opinion on Lux Fragil? I saw that Roza Terenzi is playing on September 21st, and judging by some posts, buying a ticket does not guarantee an entry.
3. About party supplements, what should I be aware of, regarding the law and the market?