Look it up on SR, there are plenty of threads about controlled drinking.
There are also quite a few former week end warriors who are in recovery (we have one in my home group). Just because you drink only over two days does not mean you are not an alcoholic and that bad things (like DUI, falling and hurting yourself, ruining relationships, blackouts etc.) won't happen.
Also for a lot of alcoholics, what starts as controlled week end binges tend to extend into Mondays then Tuesdays etc.
I think that for alcoholics, moderation is ultimately not possible and trying to "control" one's drinking is a bad idea. If you are an alcoholic, only abstinence will work.