Gorgeous space! Modern dining chairs can also be comfortable -- pay attention to the scale and proportion. These are nicely curved in the back, which is much better than chairs that have stick-straight backs.
Benches are a nice alternative to chairs -- even better when they have a back for support.
I love the lucite combined with French linen seats. 10 out of 10 points for style, 6 out of 10 for function: The table apron/twig detail looks a little low for legs to squeeze under.
Counter height stools work well in a space-challenged loft. Foot rests and back support will make your guests want to linger.
A round table encourages more lively group conversations. Curved chairs + upholstered seats = A+