The phrase "after work" refers to the time period following a person's normal working hours. It can be used to describe any activity or event that takes place during this time, such as socializing with friends or completing personal errands.
For instance, you'll know which day of the week is best to meet up with a friend for coffee or go out for drinks after work with your coworkers. (thespruce.com)
I try to stay active, even if it's just walking at night after work for 40 minutes. (theadoredlife.com)
I try to come in after work as often as I can to give a few dogs their before bed time walk and a little TLC. (la.bestfriends.org)