There are some events happing around Belgium.
The London Scala community is very active. They organise together with SkillMatters a two days conference called ScalaExchange.
ScalaDays switches between Europe and US. In 2012, it was in London. This year it'll be in NYC. It'll probably come back to Europe in 2014, most probably in Uppsala due the importance of Sweden for the Scala community.
There this also the Scala Workshop happening this year in Montpelier.
And from time to time Lunatech (Rotterdam) organises an event that very often involves Scala. It happened just last week in Rotterdam.
Kind regards,
Renato