By now I built three chairs for the U-buidling suitable to the table I made out of wood.
The chairs are made out of styrofoam and wood and are painted with Revell's beamless 84 (leatherbrown), semi gloss 381 (light brown) and semi gloss 374 (grey).
Take a look at the models of a chair I invented by myself. So the model you can see below is not an original one of the movies. By the way it's quite hard to find some furniture of the original movies. The only examples you can find in Episode I, II, IV, V and VI, but most of them are in the Cantina or in Jabba's palace.
I will do my best to build a lot of further different models of furniture suitable for a Tatooine diorama...
And I am sure you also have some ideas how they should look like and how to build them. Let me know if you do so, please...
1. Cut out a piece of styrofoam (3x2.5x3 cm)
2. Cut three big pieces out of balsa wood (6x1x0.1 cm)
3. Cut out the little pieces of balsa wood for the decor of the chair's bottom
4. After glueing the parts together you can paint the chair(s) (I painted them in the three colors accordant to the building's floor and the table)