There are a lot of occassions for using GNU Screen, most of them assume you need the ability to disconnect while leaving something running long term (e.g. irssi), and reconnecting at ad-hoc intervals.

Instead of doing something like

You can merge everthing into one command

This will create the screen socketname ‘bar’ if it doesn’t exist, and will reconnect to it if it does.

A bash alias can be used for repeatability.