It doesn't need any revision at all. I'm smart enough to use Google before asking a rhetorical question to point out how stupid you are; research estimates that roughly 11-15% of lawyers use illegal drugs, and of that 11% roughly 5% are utilizing prescription drugs (valium, percoset, oxy, etc.). That leaves 5-7% of lawyers using stimulants like coke. Roughly 15-20% of lawyers abuse alcohol.
If you actually work for a firm where 50% of its lawyers are using coke and have DUIs instead of making a gross exaggerated claim, you are in the exception, not the norm. You should get out before you get arrested with them.
Yeah in my college days I knew quite a few people who did that sort of thing. Thankfully I never used the stuff or I wouldn't be in the Navy. Anyway, fast forward 15 years and 2 are dead from OD, 2 are dead from a bad DUI crash, 2 have felony convictions and are struggling to pay bills, one has a misdemeanor and is struggling to pay bills, and one is a CEO (who spent 1 week in the hospital when he was in the DUI crash with the 2 people who died).