While some of it is quite interesting, I think this is something most soldiers around the world do in peace times. I myself have seen Indian Army soldiers eating McDonalds' at Delhi airports listening to songs on their cell phones and sometimes even pictures of them dancing to Bollywood music. Nothing much really, man.
The poster with Mao on it is simply a propaganda poster. If soldiers begin to stay pumped up with adrenaline all the time like that, they will die of heart failure. A little light times are also good for military.
Now I don't have pics to show you about how our Army relaxes because most of the pictures are taken during on duty by press or by certified photographers. So a Google search will find you some really serious and pumped up Indian soldiers in action (usually counter-terrorism or border patrol). But trust me, our soldiers also have light moments like these.