Also, on a computer, you can visit https://<team name>.slack.com/account/settings and click [Sign out all other sessions]. This will sign you out without removing the team from your sidebar. It puts a ⚠️ sign next to the icon and you won't receive any notifications! Come back Monday, visit that team and you'll only have to sign in again and you're back to business.
This Mastodon instance is for people interested in technology. Discussions aren't limited to technology, because tech folks shouldn't be limited to technology either!