We have a good family friend, faithful Irish Catholic and older man, who keeps a stocked bar and the last time we were at their house, we counted 27 different whiskies ranging from Bourbon to Irish whiskey (ahh, Jameson). And talk about tolerance - I've never seen the man drunk, but he always has a couple fingers in a glass at social events.
Not tolerance, probably. It’s because he sips. Sipping is getting to be a lost art as well.