A SSE, or Spontaneous Social Event, is an impromptu fellowship that’s spontaneous – hence the name! Whenever five or more brothers or pledges happen to do something together (APO appropriate), you can count it as a SSE, which counts as fellowship credit. Only 2 SSEs per semester count towards your fellowship credit, though.
To record a SSE, put it on the calendar sometime (the exact date and time isn’t important, but make sure you create it in the future so you aren’t locked out of it). Make the name SSE: [some title here], and add a description as well as the people who were present.