No it increases it.
There are many things that effect alcohol tolerance, and one of them is body type. Ever wondered why girls get drunk easier?.. It's because generally girls have a higher percentage of body fat opposed to males. Body fat come into the equation because that means there is less water held in the person. 60 to 75 percent of muscle is water, so a muscular person has a higher percentage of body water to balance out alcohol.
I have a reasonable fitness level ... run every day for 1 - 2 hours and visit the gym 2 times a week for high intensity work outs ....nothing impressive but i'm hardly unfit
and yeah takes quite a bit to get me drunk ..pity it'd be cheaper to be a light weight