Coming to brunch at the Grey Dog Cafe is quite an experience... And you will see that starting with the long line of people waiting to get in on a regular Saturday.
They do not take reservations but the line moves pretty quick, so be patient, it is worth it.
Once you get to the counter, you order your food. They have classic salads (I had the Greek salad with yoghurt dressing), sandwiches (which my friends enjoyed), and your classic egg plates. They also serve yummy sweet potato fries and a great raspberry lemonade, tart refreshing... Just what I needed to pair my meal. After that, you wait for your food to be ready (while you also wait for a table) and once the good is close to being ready you get your table.
Great place for a classic NYC brunch around union square that you shouldn't miss!