Its funny you say that, I noticed when I drank that I sometimes played better slightly hungover. But generally, just even being tired helps as I don't think I push myself or try to swing to hard.
Physically and mentally I am definitely not in my optimum performance state, but I think it removes a lot of expectations/tension and overthinking things. So, my advice, see 10pm @Luke WilliamsCG (but take it slow) each night you are down there.