Coming across people in the scene relies strongly on being active yourself. The easiest way would be to openly talk about your lifestyle interests to people whom you think or know have the same inclinations. Sometimes you will find that the people you least expected are just as much into BDSM and the associated lifestyles as you are.
If you know that none of your immediate friends are in the scene, then Fetlife is a good place to start. It acts a social networking site for people of a kinky inclination, but take note that it is not a dating site; for you to get the most out of the website you have to be an active user and go out of your way to meet new people and look at events in your area. Generally, if you do not know someone already on Fetlife, some of the organisers of groups/events are more than happy to add you and give you some help with introducing yourself to the site, and the scene in general.
Have Fun
SIncerely Sir