A) Used to years ago, never really liked it then and don't like it now.
B) At a pub, yes and amongst friends. I never drink alone, definitely a social thing.
C) Pizza yes, once every week or fortnight. I don't consider pizza junk food, unless you're eating crappy frozen pizza or a whole pie of it. Otherwise, I'm pretty junk free. I don't eat meat really save for seafood - love Japanese way too much to be a vegetarian (though I have been) or vegan (like my cheese, though I only use soy milk).

Being healthy matters to me. After having had four relatives pass on in the last three years all due to bad eating and health habits, it only re-confirms this. I'm always telling my parents to eat better and live healthier.