Post-final-round, pre-awards CTP contests are fun, because they fill that dead time. I've seen a few places give away a portable basket if aced, which ramps up the interest.
At Earlewood we once ran a putting contest indoors. People could try to qualify during the lunches or after the Saturday rounds; those quote qualified for the finals competed during that interval before the awards.
At Stoney Hill we do a variation on the CTP, during competition, giving a box of beer to the longest putt made on hole 18. The baskets on a tall mound next to O.B., so whoever wins not only hit a great shot, but a high-risk shot. (Some claim they need the beer before attempting the shot, which is a little problematic).
We also did a post-round-4, USDGC-like distance throwoff across the pond once or twice. Only a few contestants, but lots of spectators.