Is there any seating in the music venue upstairs, where you can still see the stage?

There are only a few stools (maybe 10?) And you could move them to the edge of the balcony

What Bill said. Get there early to get a seat with a good view. There aren't that many.

Officially there is no seating... However it is common for the first into the venue to grab the balcony barstools and sit along the balcony rail.