As I also live alone, I can smoke in the house, though this is usually confined to the downstairs and with the kitchen door open, usually in all but the coldest of weathers. Often I simply stand at the back door and puff away, blowing the smoke out if the wind is in the right direction! Occasionally I light up in the upstairs study if I am typing or writing, but the stale smell tends to linger so don't often do it. It is pleasant though, with pipe between teeth as I tap those buttons. On pleasant days, I sit outside at the table and enjoy a good pipe whilst reading or writing. With a cup of tea, there is nothing better!
As to amount, used to be about three bowls a day before retiring two years ago, roughly 25grams a week. These days, about twice that, depending on the busyness of the day. I never smoke with family or friends or when I go out shopping or to part time work, except in the car returning home. I always have an early morning pipe (the best of the day, I think) and then spread the rest fairly evenly throughout the day, finishing with a flake last thing at night. Occasionally, when unable to settle to sleep, I've got up in the small hours and had part of a pipe then, but not often. I so enjoy the whole process of filling lighting, smoking and even cleaning. It has to be an obsession, don't you think?!
G.