I've used the SA100 before at public nights - people are usually wowed by the colours thrown by stars and if you aim the telescope at a bright, tight open star cluster it can be quite spectacular through the eyepiece. IC 2602 in Carina is good at this time of year. You can explain the valuable information that spectra show but mostly people are trippin' on the psychedelia of it all!
At tonight's event there will be a First Quarter moon in the sky so it's not ideal for deep sky and I was looking for other infotainment to supply! I have a webcam and because dark adaption won't be critical I'll do the Moon, and Jupiter if it's above the treeline at the observing site. The SA100 might be good to show the double in Alpha Centauri - unfortunately Eta Carinae and V1369 Cen are too dim for that set-up (checked the other night) which is a pity because they throw such interesting spectra. Need some mag 0 to 3 stars with some big emissions!
Cheers -