This story has been updated with more information about the service.

Winston Club wants to cut your hotel bill in half, but for a price—you’ll have to room with a stranger.

The travel website, founded in November, says it helps users save money on the cost of a hotel room by matching them up with someone else planning to stay overnight in the same area. It’s a member-only service, but it’ll be completely free for the user. The LA Times reports that, similar to other booking websites, Winston Club makes money by collecting a percentage of the room charge.

In a company blog post, founder Bryon Shannon said that Winston Club spends “a lot of energy” screening members. You can accept or reject someone you’ve been matched up with based on the biographical information they offer on their profile.

Shannon told Fortune that the service will launch in five cities this March—Los Angeles, San Francisco, Seattle, Portland, and Las Vegas—and it will be working with four and five star hotels. The site plans to focus on establishing a strong foundation in those locations, and will “evaluate expansion to new cities in the second half of 2016.”