Yes I do like to drink alcohol when I play poker, especially freerolls. I feel like this helps me to be a little more aggressive when typically at the poker table I am more conservative.
I don't think that alcohol helps you concentrate anymore when you play the game. my method of concentration when I play is listening to music. specifically, I listen to music without lyrics so that I am not focusing on the words of the song.
buying time is the whole point..