Another side ....
I have been in this position, and there are other sides to this issue:
1) Bosses will casually watch, some might even play pretty good. If they have heard you are pretty good, and just see you acting so casually and just cutting up, trick shots, behind the back, missing easy shots, they could get the impression that you are a goof off, that you can not back up what has been said about you, that you are not as smart as they thought you were.
2) Don't play all night. Play for 1/2 hour and give it a rest. When you get beat, just smile, say nice game, and shake their hand, then go dance, or get some refreshments. Bosses, especially, like to see if you are a well rounded person (especially if you are being considered for a promotion), but they expect you to be GOOD at what you do.
3) Most of the challenges to the table will be by people that just play ocassionally, and not that hard to beat. Banking is a good way to help even up the odds a little, but don't go missing on purpose.
Been there - done that, and I got more respect after they saw me shoot Pool than I did before, especially from Bosses. In fact, I ended up on my bosses team playing league, was the anchor man and highest average on the team, and we won 1st in the league several times.
And, remember, when you show good logic skills on the table, a boss or two may be relating that to a project or two he is considering you for.