A lot of us who live in apartments are unaware of the gym right at the stairs. No need to join any other gym out there.
Just purchase a pair of dumbbells and walk up and down the stairs. You can do various exercises when you either reach the top or the bottom. 
Of course make sure you don’t feel faint as you carry your luggage as falling can lead to serious injury and property damage. I can recommend bending to make sure blood rushes to your head if you should be faint. You can pause midway and catch your breath.
The best thing about our indoor gym is it’s available 24-7, and no worries about personal security at night. Of course don’t hog food right when you get back to your apartment, start with fruits or veggies 😀
