Service Action Ideas???
The go-to when no one seems to be communicating on the event page is donate cab fare to a charity. It's an acceptable service action (for most events) and is easy to get done.
Some that have worked really well have been bringing donarions for homeless shelters or canned food for a food drive.
ForLights it can be good to contact the cadre in advance and see if they want to do something during the event or want it to be more hands off.