Think of it this way, if your going this far to get muscle gains your damaging your liver very badly with supps alone. im sure even a beer would give it a spike in the damaging process. and if you absolutely need to drink which is why your curious and asked the question, im sure you wont be having just 1 or 2.
..its up to you, just hope your not the kind of person that needs to start coughing up blood before he realizes he f*cked up..