That's not the case. Many of us are working two jobs and doing too many other things to get a decent night's sleep. All I can say, is for you to do your best in meeting these obligations to your health. Training should be strict and short. Get in, do your job and go home.
Many people seem to think the gym is a place for social gatherings.
I disagree with that opinion. If you are working out properly than you will have neither the time nor the energy to put yourself in a social situation. The program you see above is based on working one body part per week. I like to start my week off with my weakest part and finish with the strongest. Feel free to use this information and change it to suit your needs.