One thing you need in Vegas is a 24 hour dining option. And if you're on the Strip, Peppermill is a phenomenal option. There's two sides to the place. One is the Fireside Lounge, which has a wonderful 80s retro vibe to it, especially with the lighting.
The restaurant side is where I went, though. The menu is pretty typical of a lot of the 24 hour diner options -- an expansive menu of appetizers, sandwiches, entrees, and breakfasts. My French Dip was excellent especially with swiss cheese and mushrooms, both of which were extra. The service was very typical of the Strip -- very attentive and a team of staff as opposed to one specific waiter.
By far, one of my favorite dining options and a rare remnant of the old school Vegas.