Earlier quoted context omitted.
I would say that 3-4 beers several times a week is allot of alcohol. It is an amount where I would definitely start to think that ones life would be degraded in certain ways by the amount of alcohol consumed. Where I live the recommendations are that people that drink 10 or more units of alcohol per week should be provided support from the healthcare system to reduce their drinking.
As pointed out by the parent comment, one strong 16 Oz can is already 2 drinks. Having 2 of those in a night or even slightly weaker ones puts you in the 3-4 drink range. I'm sure I'm not the only one with a habit of having 2 of those a few nights a week to tie a long day off.
I prefer IPAs which average closer to 7% and that higher alcohol concentration seems to make a big difference. Drinking 3-4 of those can get a person quite drunk.