Best way to get rid of extra alochol?

A buddy of mine who was a hobby bartender developed an allergy to alcohol and bequeathed me a ton of different types of alcohol. There are only a few bottles of things I want to keep. Any suggestions on the proper way to dispose of the excess? I’ve tried giving it away but didn’t have much luck. I hesitate to pour it down the drain because I’m on a septic system and it might damage the fauna and flora in the tank. I’m not near any fraternities so I can’t leave it on their doorstep. Thoughts?