I'm going to check out to get some work done
What exactly do you mean when you say check out?
Generally I will leave the public environment and be mentally disengaged from social life for a while
If your work is that important to you then I don't see anything wrong with that.  Having to prioritize work from time to time over personal life is totally okay.  I hope you finish what you need to get done!
I do it all the time.
If it hasn't harmed you in the past hen there's no reason to change up your approach.  As long as everyone else isn't worried about you, then I say go for it!  Just make sure you let others know why it is your disengaging before doing so, so they don't worry about you!