Find friends for Hallowmas
Hallowmas is the feast of confessions. From your lodgings, select the Confession at the Feast of Masks storylet to see options for hearing confessions from other players.
Depending on the confession type, the other player will need to have a particular menace - Wounds, Nightmares, Suspicion or Scandal - at 3 or more. (It's not a bad idea to maintain all of your menaces at 3 or more for the duration of Hallowmas in order to be eligible for the different confession requests.)
You can find a contact by using the 'Suggest a contact' button next to the invitation. And, depending on your social network of preference, you can find other players to exchange confessions with in the following places:
Twitter
Tweet your username and the tag #hallowmas. You could follow @echobazaar and @failbettergames while you're there, if you fancy.
Facebook
Add your username to this post.
Reddit
The seasonal discussion thread and the monthly active players thread are both good places to meet new friends in the thriving Fallen London sub.
Tumblr
Reblog and add your username to the master post for making friends at Hallowmas.
Failbetter Forums
There are numerous threads for players to make contact with one another, depending on your goals:
Master post
Optimizing confessions thread
Hallowmas tips
Strategic betrayals for gaining Connected: Masters