Old timers meetings are always fun - basically you have an old timer (30+ years in my area) that is the speaker.
Just a general speaker meeting, our local speaker meeting has these minimum requirements - more than 8 years sober, must have a home group and a sponsor.
Candlelight meeting
Ask it basket meeting - have everyone in the room write down a question on a slip of paper, put it in a basket and then the chair person draws the slips and people share their e/s/h about the topic.
people have also listed many other good ideas.