It will be interesting to see how many ounces pours will be at 15%. I've seen some places serve around 5 oz. when ABV is that high.
If it makes it up to the White Horse, Brian will likely sell you a pint if you want, otherwise 10oz snifters. I dont see them getting smaller glassware for one beer. Darkness/Five were $8 a pint last fall, SYX would really be a one and done deal.