I use metric measurements in the kitchen when I'm baking. I'm used to doing quick calculations in metric because of working in labs. Wearing a white coat and a demented grin. For distance I think in miles, yards and feet, except when I'm doing any woodwork stuff when I switch back to metric because things are sold in mm rather than inches these days. Temperature I work exclusively in °C. Older people tend to refer to the temperature in °F when it's warm and °C when it's cold. I think they like the extremes of saying "It's over 90 out there!" or "It's minus 1 today". 18 below sounds better than -1°F.

I only played D&D once back when I was 17 and I can't remember there being a map. Maybe there was. I meant to get into it, but I never got around to it. I think beer was more attractive to me. I started MUDding in the early 90s though and could relate all the abilities and bonuses to dice rolls and multipliers on the character sheets.