I had a drop-in table once and the chairs are just too close to each other. I ended up having to only use every other chair to keep them from taking food off each other plates or just poking and hair pulling. They then used those spare chairs as food and cup dumping ground.
I have mostly Kaplan, Flash Furniture and ECR4Kids furniture. You can get ECR4Kids on amazon and target, too. Flash I got at Bizchair.
I ordered every bit of mine online.