as we cannot change the larger situation, why don’t we do x? / doing x is probably our best choice
You don’t have to be at work for another week. You may as well take a trip somewhere while you can.
I’m going to be here for a while. You may as well get used to it.
We’re going to be waiting here for a while. We may as well play a game.
Since we have been paired together, we may as well try to work together.