The Tugboat is one of the all time classic apres ski spots. It's well known around North America. So it's always a good spot to hit. The other classic spot at Steamboat is the Slopeside Grill. You can literally ride right up to it. Park your board outside, go in and get a beer. The food is pretty good there too. There are a few other spots. Some club type place that I have no idea what the name is now. Between the Tugboat and Slopeside you should be fairly entertained.
slopeside is good. i would recommend the french dip. just got back from steamboat yesterday actually