Counting only rounds when I was playing by the rules (no mulligans, gimmes, improved lies, etc.):

Worst: 117. Was a guest at a gorgeous country club with the fastest greens I'd ever played. What a nightmare for me, lagging my second putt all day long! Another guest in our group had an even higher score, so possibly I wasn't the one they talked about later! (Nah, they probably ripped me, too.)

Best: 79, on a nicely kept muni (par 71; slope 119). I got to the course late and had time for only a few putts before teeing off. I was with 3 wildly inaccurate golfers and got roped into riding (I prefer walking); spent the day rolling through the rough, looking for lost balls. Don't know how I managed to play well! I do remember trying to hit good shots not because it would help my score but because there'd be one less ball to look for that way!