The Cafe Bellagio is one of the more casual restaurants in the Bellagio Hotel. My wife and I were looking for a late evening meal. Situated at the end of the garden court we found a short line of customers, but the floor looked full. The hostess offered seats at the counter and our stomachs said, "Yes"! This was a fortuitous decision and a suggested option if it's available to you. The service was very quick and personable by our waiter, James.
The food is basically Americana, but the menu was pretty varied and offered some "healthy" options. My wife had a burger and I tried one of their wraps. Both of our selections were good. James was super attentive and made the meal enjoyable.
If you're looking for a straight forward meal, the Cafe Bellagio is a good option. If it's busy, try the counter.