optimistically i can count 4.
#1. this was when i was still smoking
tobacco. on my way to class i found my friend using a ego
tank before class. i also see her and her bf around quite often, as they live by the cafe i casually work at.
#2. at a staff party i encountered a lot of people who vaped, but they would rather smoke while enjoying liquor.
#3. this was about a month ago. i was selling memberships for a venue i work at, and a dude had a small pv with a blue led. we allow the use of pvs in our venue/bar/club.
#4. again selling memberships. it looked like a really crappy build, and was a complete analog replica. my pretty standard ego with smoketech dcc put the vapor production of his pv to shame.