It's a little bit hard to find the first time, but Black Dog is a really nice place to sit down and have a nice warm drink. They have plenty of coffee (I don't personally drink coffee or tea, and I still have plenty of choices left on the menu). There are some baked goods also available if you are hungry. They accept cash, but they don't accept plastic of any kind (you can always run to the ATM at Publix across the street if you forgot your cash).
There are tables and chairs both inside and outside the building. Even though there's not a lot of square footage inside, it is comfortable place to read or chat with friends as well as the bonus of avoiding the smokers (I personally don't smoke). If you're a smoker, the deck out back is ok to smoke on. Heck, the deck is great for everyone. It's a great place to watch the ducks or even the people who like to stroll around Lake Ella. Some dog walkers will even bring their pets up to enjoy the ambiance with them.