Thinking back over some memorable metric and standard centuries since the 1970s...
A cliff side cantina midway along the Rosarita-Ensenada ride during the late 1970s-early '80s.
King Street Grill food truck BBQ and a couple of beers from a favorite local microbrewery tap room during a spring metric century. Some of the best BBQ in the area, mobile or otherwise.
Way too much schnitzel and beer at Greenwood's on Blue Bonnet Circle in Fort Worth at the 75 mile mark of a birthday century that turned into a 125 miler last fall. Only problem was all the burping on the way home.
Most of these memories are associated with group rides and good friends, so I'm biased. I could have eaten Jack in the Box mystery tacos, two for a buck, and probably been happy.