What are the most popular organized Rackets?

Hello,

What are a the most popular organized rackets conducted by organized crime?
So far I got these
Numbers (Better lottery payoffs)
Drugs (Of course)
Prostitution
Protection

Please give examples how these are runned basicly
Numbers: Selling lottery tickets beside you taking about 20% of each ticket as profit
Drugs: Traffeking, and Drug Houses
Prostitution: Whore houses??
Protection: Making people retribution for having a business


Please give all racket you know off or you heard of Thanks

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SeArCh gOoGle

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