Went to Plaka Taverna tonight with some coworkers, and we had a nice time with some great food. At 7pm on a Wednesday night there weren't many other customers - really just one man eating by himself and another that came in to place a takeout order. Perhaps there aren't as many diners because of its location off of Capitol square. However, since there were few people we got great service and great food.
I ordered the moussaka, which is kind of looked like an eggplant lasagna with slices of eggplant stacked with a tomato-meat sauce and cheese. It was delicious - savory and eye-appealing. It also came with green beans and rice, and I was quite satisfied when I quickly finished my plate, not because the portions were small, but because I enjoyed the food so much.
Our server was really nice and ensured we always had water. She explained menu items to us and helped us in making our selections. I'm inly in Madison maybe once a year to work, but I'd come back to this place.