Well I think people have their own reasons coming back. It's not all the time that it's about money or gaining back lost capital. Some older people, for example, just enjoy the feeling and ambiance from casinos. It relaxes and relieves stress. Some always go back just to experience again and again the feeling of excitement gambling provides or just plainly for the fun of it. Not everyone's going back just for money.
You are right here, I play just for entertainment after a days hectic schedule,I do it just to relax and killing the time before I sleep.Whether I won or I lose,i stop when I am sleepy already at night. On days off, I do play also.