The phrase is casual and might not be suitable for formal situations. I wouldn't recommend trying to bluff your way in during a formal interview.
Pro Tip 2/3
Negative Connotation
Using it may suggest dishonesty, so be cautious with the context. When the story came out, it was clear he had bluffed his way in.
Pro Tip 3/3
Cultural Implications
In some cultures, attempting to bluff your way in can be seen as clever or resourceful. In this entrepreneurial event, many admired how he bluffed his way in.