The shake is the third beer milkshake the chain has featured (the first two being the Oktoberfest Milkshake and the Winter Beer Shake).
You can expect the shake to cost about $5 (compared to $3.29 for a non-alcoholic shake).
Also, Red Robins brings back the Chili Chili Cheeseburger for a limited time. The burger features a beef patty, chipotle aioli, cheddar cheese, diced red onions, and the chain's "Chili Chili."
Pretzel Bites are also back for a limited time. The bite-sized soft pretzels are served with Merkts beer cheese or beer mustard for dipping.
I'm going to go out on a limb, and say you can expect the Irish Beer Shake to be around through St. Patty's Day.