I'll drive after one or two beers. The law is .08, and one or two doesn't put you over .08, so the people who are arguing that you're endangering lives don't particularly know what they're talking about. Any more than one or two and I don't drive unless I wait long enough for any impairment to go away. I have, however, been the passenger of a drunk driver many times. Two of them got DUIs, one blew .154 like 3 hours after they stopped drinking. The other blew barely over the limit, .10something.