Someone else asked a similar question a week or so ago.
My room is ~21', with 2' of it taken out by a false wall up front.
I have a couch as a front row, (closer than I like), second row of three seats (my ideal position, about 12' from the screen), and a third row of seats on a riser, along the back wall.
The projector is ceiling mounted close to the back wall.
If I got rid of the couch, moved the second row up a foot or two, and moved the back row up a foot or two, I could probably squeeze a "bar row" behind the back row. Keep in mind that your back row would need to be non-reclining or you'll have to deal with the space between the seats and the bar. Projector placement would also need to be considered.