Since the US Amateur (ball-golf) tourney is going on right now, it reminds me of an idea I'd like to see: a one-day stroke / match - play event. In a two-round event, everyone plays one round of singles to set the seeds. Then, pair them up for matchplay in round two (1vs2, 3vs4, 5vs6, etc). You could even group them in foursomes and play the front nine as the semis (1vs4 and 2vs3) and the back nine as finals. The top X overall get paid as normal, but you could also give a small payout to the winner of each pair or foursome. I like it because matchplay adds a different dimension to the game.
If you only play one round, you could either play the front nine as stroke play and the back as match, or alternatively, if you have handicaps or rankings from previous events, just pair or group people up based on those.