In many countries and areas there are Ásatrú congregations that organize activities, blót and parties.
Some are unofficial groups serving a purely social and religious purpose, while others are state-recognized religious congregations that have the right to perform weddings, naming ceremonies and funerals.
You can find most of them online, but be careful when searching, and read their pages carefully before contacting them: Some of them are so-called “Nordicists”, i.e. neo-Nazis like Troth, AFA, AA and fornsidr-dot-com, who have seriously misunderstood Ásatrú (read History – The dark chapter).

You can find some of the state-recognized congregations here:

Denmark: fornsidr.dk
Sweden: asa-community.se
Norway: forn-sed.no
Iceland: asatru.is
USA: fornsidrofamerica.org
UK: asatruuk.org

You can search for “asatru”, or “forn sidr” + [your area]