This video (more so audio) examines Dr. Martin Luther King, Jr.'s take on service. His definition can be adapted to how we should do seva. Aside from the content, the audio is amazing to listen to and really sets a note for how we'd like to craft our speaking style to better retain the attention of our audience members.
Feel free to this video as a point of discussion in ghosti or even as an unexpected sabha opener on the timeless topic of seva.
Again, thanks for your contributions; keep 'em coming!