Okay, so we know that River Song escapes from her prison cell on a routine basis, and goes gallivanting around the universe. As I've heard it put, she basically just uses the prison cell as her apartment in time-space.
How is it though that she keeps getting out of her cell? We've seen her use at least one trick (the hallucinogenic lipstick). I would think though that any given trick would only work once or twice, MAAAAYBE thrice if she got lucky.
So how does she keep getting out?