Los Angeles — More than a decade ago, Tinder became the hottest dating app, transforming modern romance by making it possible for singles to swipe through people's profiles, match and meet up.

Now, Tinder is fighting to keep the flame alive. Sometimes in unexpected ways.

Last month, it convinced UCLA students to meet in a big group in the real world. They danced together as 26-year-old DJ Disco Lines played a set at the Fowler Museum on campus.

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