As Last Vegas glides along, satisfying expectations while always aiming low, it makes peace with being inoffensively mediocre. Like Vegas itself, the story goes down easy, but its appeal is hard to remember once you leave it behind.

Although formulaic in design and programmed to meet its quota of laughs, the film makes a point of going beyond basic expectations into some legitimate aspects of mature friendships without getting soggy about it.

After a while, you truly start to see the formula gears churning, but given that, it helps to have an actress like Mary Steenburgen, who at 60 still possesses an amazing glow, as well as a snappier comic timing than ever.

It certainly doesn’t hurt that Douglas, De Niro, Freeman, and Kline are just plain fun to watch together. As predictable and occasionally uncomfortable as Last Vegas can be, it’s an assured crowd-pleaser.

Last Vegas isn’t “out there” in a “Hangover” sense. It’s comical comfort food, with actors doing the sorts of things they’ve done for decades. But even if this is the safest Vegas romp of them all, this cast never lets us forget that we’re in very good hands.