Playoff hockey, it occurred to me Saturday evening while sharing a confined space with a mix of colleagues and strangers turned friends, is kind of like getting stuck in an Enterprise Center elevator. In the end, the only thing that really matters is emerging victorious. The Blues did just that in Saturday’s preview of their first round of the Stanley Cup playoffs, and I’m proud to say the 11 of us who spent nearly two hours — it was 1:47 to be exact, as timed by the watch of Post-Dispatch teammate Tom Timmermann — can say the same thing on our end. Yes, the Blues somehow squandered a three-go…