You can find chair in category Dining Chairs (75$) and tables in category Dining Tables (100$ & 125$). The archive contains .package and .sims3pack formats.
Meshes of chair consists of 3 subsets: seat, cloth and bow. Mesh of table consist of 2 subset: surface and cloth. This meshes is created in original game and should work with any addons.
Meshes consists of 2 subsets: furniture and shadow, first it is possible to recolour. This meshes is created in original game and should work with any addons.