Smoking room advice

Need a little help here.

I'm going to take an unfinished room in my walk up basement and use half of it as a smoking room/office. There are some things I can already figure out how to do like the space is already framed I need a carpenter to put up a dividing wall, run some electrical that kind of stuff. But some things I don't even have a clue that need to be done:

- How do I "air proof" so the smoke stays inside rather than outside? Especially with with a playroom right next door I'd like to be able to smoke but not affect the kids.

- Can I run heating and AC into the room? If I can't its OK as the room is cool in the summer anyway and I can simply use space heaters in the winter if I have to. But if I have someone run ducts again how stop smoke from entering the house?

- Air purifers, smoke eaters or simply exhaust fans? Whats a guy to do?

- All the other stuff I don't know that I don't know.

Now while I don't want to stop people from chiming in what I'm really looking for here is advice from either professionals in the field or people who have completed the project already.