#2) Number that usually results in cheap magician's trick: Ask someone to pick a number in his/her head between 1 and 50 with both digits odd and the first digit less than the second. Victim usually picks 37 because of #1).
#3) Birthday number most likely to trigger a mid-life crisis.
#4) The number of men a woman must give a blowjobs to in order to become a slut (see the movie "Clerks").
It was a dark and stormy night. A tall dark man wanted to buy a newspaper but had only 37 cents.
Valley Girl: Oh my God! You're like physic or something. How'd you know I was thinking "37"?
Amateur Magician: You dumb bitch!
"Oh my God! I'm turning 37 next week … the late thirties…and I still haven't picked a career!
Man: How many men have you gone down on?
Man: Oh, I see. Thirty-six including me isn't so bad.
Woman: Including you, thirty-seven.
Man: THIRTY-SEVEN!!!! THIRTY-SEVEN!!!
Customer: In a row?
As said in Kids Next Door episode FLAVOR (find lost ancient variety of refrechment), there are 37 flavors of icecream! If that's not lucky, I don't know what is.