Yes alcohol lowers test. But you know what, for those out there getting sh!t faced every weekend, damn bros have some self-restraint. I drink, but it never goes past 3 beers at the most, or 1 shot of tequila and a single beer. I got goals to accomplish so drinking is not really in my bodybuilding protocol.
If you're serious about your bb'ing goals, then minimizing alcohol should be just as important as anything else that's required (working out, eating etc...), and you shouldn't have a problem lowering your alcohol intake. Some people act like they can't socialize/party/live without getting f*cked up.