A UFO and alien costume contest will precede a screening of “ET the Extra-Terrestrial” at the Little Art Theatre on Friday, June 6. The contest begins at 6 p.m., and the movie starts at 7 p.m.

Think of it, perhaps, as Banksy-style performance art. Earlier this year, when Mr. Bouffard imported his running activity from Runkeeper, another GPS fitness-tracking tool, to Strava, he realized ...