If you can't drink socially by having one or two drinks, you need to do whatever it takes to quit drinking. When your friend fell down in the video, she could easily have hit her head and died on the spot, or caused herself brain damage. It's just not worth it. I've been without alcohol for 15 years and although it was a little tough implementing that in the beginning, i sure don't miss the unknown factor of drinking too much.
Please consider quitting.
I don't know anything about the "date rape drug" but I do know that SIX cocktails is a lot of alcohol !! - and my guess is You and Your friend have done considerable drinking in the past if You are able to consume six drinks in one evening.
Your blackouts were huge warning signs that You need to stop drinking entirely. If not, the black outs will continue. This I know is true
how many shots of booze in each drink?
Sounds like someone slipped rophanol, the so-called "date rape drug"in your drinks. This is a typical scenario.