How To Smoke During Zombie Apocalypse:
1. Try to stay in the middle of your base, away from windows.
2. Try to flick your lighter on as quietly as possible.
3. Have something to completely cover you like a blanket, The lighter will attract them otherwise.
4. By this point bongs are obsolete unless you live in a windowless highly protected room. Pipes are otherwise silent.

I Hope You Like This Zombie 101!
~ Boo