BOSTON GLOBE - Filteroff, a video speed dating app, is hosting an April 11 event for people attending the Boston Marathon as runners, friends, family, or fans. Users will be matched with up to "eight people, based on their preferences. The dates will last ~3 minutes," explained Zach Schleien, co-founder of the Filteroff. Filteroff launched in February of 2020 - a complicated time to start a dating business. But Schleien said the pandemic changed people's perceptions of video dates. "We've hosted ~13K virtual speed dating events."