Below is the list of those parties in Finland, which I have so far become aware of. It includes the kinky-parties in Wildclub near Helsinki, but not the swinger-parties of the club. Changes are possible.
JANUARY
4 Club-night (a party in restaurant) in Helsinki (Restaurant ship Wäiski, upstairs)
25 Fetish club in Turku
MARCH
8 Club-night (a party in restaurant) in Helsinki (Restaurant ship Wäiski), and Kinky-party in Wildclub near Helsinki
15 Fetish club in Turku
APRIL
12 Dresscode party in Jyväskylä
26 Fetish club in Tampere (restaurant Mixei)
MAY
3 Club-night (a party in restaurant) in Helsinki (Restaurant ship Wäiski)
10 Baltic Fetish Festival (joint Finnish-Estonian endeavour) in Laitse Linna near Tallinn
17 Kinky-party in Wildclub near Helsinki
31 Kinky-larp of Häkki near Helsinki
JUNE
7 Dresscode party in Turku
JULY
5 PervPark III Party In Helsinki at Suvilahti
26 Club night in Tampere
AUGUST
23 Party in Turku
SEPTEMBER
6 TAFF (Tampere Fetish Factory)-party in Tampere (the date may change)
13 Kinky-party in Wildclub near Helsinki
20 Club-night in Turku
27 Club-night in Helsinki (Restaurant ship Wäiski)
OCTOBER
11 Dresscode party in Jyväskylä
NOVEMBER
1 Fetish club in Turku
15 Parties in Helsinki in Agros hill and in Wildclub near the city
DECEMBER
6 Club-night (a party in restaurant) in Helsinki (Restaurant ship Wäiski, upstairs)
In addition there are some more or less regular munches at least in Helsinki (every Wednesday in Majava bar, Porthaninkatu 9, at 6 pm), in Espoo (every Thursday in restaurant Kannunkulma, Kannusillankatu 2, 7 pm), in Turku (every 2nd Wednesday of the month), in Lahti (in restaurant Teerenpeli), in Vantaa, in Joensuu, in Kuopio, in Oulu, in Jyväskylä, in Tampere, and in Kouvola.