Hotels are kind of a crap shoot. "MASN" might not be listed at all on the TV-channel listing card.
When I was in Charlottesville, the Nats game was on one of the ESPN channels.
Best thing to do, channel surf after the game starts and see if it pops up.
Yeah, you should see the pregame show on now. And my gym has MASN, but not MASN2 (and for a while, they had MASN on two different channels!). Since MASN2 isn't a full-time channel, it's a little more difficult to find sometimes...