Gambling

Guelph's mobsters were mostly interested in gambling. Old time gangsters like American bosses Meyer Lansky and Lucky Luciano and like Hamilton's Johnny Papalia wanted to control gambling. When he 'died' in the late 1970's Guelph's Frank Silvestro was the province's dominant loan shark, and since loan sharking is a service industry to gambling, it's not hard to suspect that his local associates and relations were well placed to profit with him.