NEW YORK TIMES - Last Thursday night, dating app Thursday was hosting a singles' mixer. The app is accessible only one day a week. When the clock strikes midnight, users toggle an icon to indicate that they're ready to date that day. Then, for 24 hours, they can swipe and chat as on other dating sites. When Thursday becomes Friday, however, their matches are wiped and the app locks. The implication is that there’s no time to waste with chitchat; making a date is now or never. To encourage those IRL meetings, Thursday hosts events in London and New York, the two cities where it is up and running.