Eliminate the long email threads and reply all spam
At one point, you have probably experienced long email threads between more than 3 people that have more than 6 replies underneath the same email subject. Whether you were actively engaged in that email conversation or simply a victim of a misused reply-all, there is a point where email communication is no longer productive. It can also be troublesome to have to dig through your emails and find specific items.
That's where Slack comes in by replacing those internal email threads. Instead of communicating through email, members can communicate through Slack using designated channels based on topics, committees, and work groups. Members can discuss and plan the next service project over a channel called #communityservice, or your crab feed fundraiser committee can discuss next steps in a channel called #crabfeedteam, or you can simply send a direct private message on Slack to your friends Dave and Sarah. The possibilities are endless.
In addition to having mobile, tablet, and desktop apps, Slack also works directly in the web browser (if for some reason you are allergic to apps), and it also integrates with countless other services like Google Drive and Dropbox.
It's important to note that Slack does not replace external emails; emails that need to be sent to anyone outside of your club, as they probably are not on your club's Slack.