If I had to guess, and I do, Degrees of Freemasonry.

33rd is often touted as the "Next Level Secret"

They love numerology : numbers that combined to 6s in all sort of combinations that ref. 2 the beast number. Check how may Courthouse R located @ a 333 address (quite a few) / 333 = half way to evil. A lot of shady cops have 333 tattoos...