The skill, they say, is to find a slot machine that's hitting ; that is, a computer that's programmed to pay out big money.
Slot machines are computers which can be programmed.
There is no skill spoken of in the search for slot machines.
Two children are swinging.
People are standing inside a building.
I think that it's important for everyone to know how the engine works.
Someone is speaking.
A  man is holding the hands of two monkeys.
A nightclub is silent and empty.