(No smoking, though - I live in an appartment building and my neighbours might complain)
While smoking, indeed, originally was done to preserve foods, these days smoking is mostly done for taste.
A 'grill starter
' can actually be used as a smoker! (for smaller portions of course).
You light some charcoal in the bottom of it, add the moistened hay, place the things you need to smoke in a sieve on top and cover with a wet tea-towel... a couple of minutes later you have delicious smoked something-or-other AND it can be done on the parking lot of an apartment-building