I usually smoke one before I meet them and they won't realise
too, because they don't go so near me to smell my fingers or smell
my breath I guess. haha
Anyway, just to share my personal experience, some of my
non-smokers clicks don't know I smoke too, and when some of them
do, they ask why I don't smoke when I'm with them...I thought for
awhile and realise there're some people who would take you as 'act
cool' when you smoke even when you don't feel so. Besides, you are
being considerate for now blowing those known as 'harmful gases' to
them because you have a filter, they don't. Also, it's quite
awkward to smoke alone. For me that is.