To varying degrees, pledge hazing rituals were practiced by all the fraternities in my school's Greek system, the culmination of which was enduring Hell Week prior to formal initiation.
Our house wasn't as bad as others, but still managed to break pledges down with the standard stuff:
> Verbal humiliation
> Endurance beer bonging
> Performing lewd skits outside a sorority
> Kneelling, crawling, underwear-sniffing, blindfolding, barking
> Scavenger hunts
> Late-night physical test wake-up calls