It's a "meet 5 random people for dinner/drinks" app. Actually sounds like it could be fun.

It is fun!

Of course tables are hit or miss - but learning how to carry a dead table is a fun challenge in and of itself. My city has a fairly extensive WhatsApp group for timelefters, usually all of the various tables meet up after for drinks and more socializing.

There's a subreddit for people using this app, if you're curious: r/TimeLeftApp