Quite a few events on Facebook though they might be, as ripov says, "an excuse for music and beer"
https://m.facebook.com/search/events/?ssid=b2a752604aaf453dfcfd171e6c2249b8&search_source=filter&q=Wassail&tsid

and a few here
http://calendarcustoms.com/january/ & a couple in the December listing.