Many have benches not chairs
exactly, I think this adds to the dynamic . Benches w shtenders you can only sit next to each other (or one stands and one sits). If it’s tables and chairs I think the majority will sit opposite each other (maybe w the exception of learning mussar seforim you might sit next to each other)
With shtenders and chairs I think you’ll find a big mix in the bm w some side by side, some facing each other but positioned side by side, or one standing one sitting