That's the dating board all right. I think that is a universal challenge right there - how to approach other people when you want to engage in some very specific activity with them. I'm afraid there's no shortcut most of the time, when we're talking about something this personal - although posting on a website dedicated to bdsm stuff may make things a bit easier in regard to spanking prospects.
Going to parties sounds like a good start. Get your face seen a bit, and get to know some other kinksters. With any luck (and pleasant behavior), word will spread "yeah i've seen him, he's a good guy, let's spank him real good". If you're more interested in spanking than getting spanked, then odds are slightly in your favor, but still you usually need to get to know your
victims partners at least somewhat before proposing any actual action.
There are monthly munches and weekly meetings around capital city area. Attending any of those will have the added benefit of lowering your threshold to go to actual parties (depending on how outgoing you are by default).
In Espoo, there is a meeting at restaurant Kannunkulma every thursday (need to check if it's still there or if it's moved elsewhere already). I remember talking to some non-Finnish speaker there the only time I attended (weekdays are a bit difficult for me). The next Kinky Finland munch will be at bar Thirsty Scholar on April 14. There is no dresscode to the munches or meetings, but you can wear some inconspicous theme-related accessories if you feel good about drawing some attention
Oh, yeah, and
welcome!!!