May a Jew watch sports at all?
It's a fine line.
See this article, which talks about the fine line between recreation / relaxation time (permitted) and wasting time (forbidden). It specifically mentions watching the Super Bowl.
May a Jew drink alcohol with non-Jews?
The halacha according to the Shulchan Aruch is that one may not drink beer in a
place of non-Jews (such as in their houses or stores) since doing so may bring to chasnus
(intermarriage). However, this is only if one is drinking for a long time, but if he makes it quick and is not accustomed to do doing it, then it is permitted. A place of goyim means a bar where they consume these drinks, but a store which is not meant to sit down is not included in this halacha.
The Rema says that the custom is to permit beer made from honey or grain.
(excerpted from here )
So, if you think that you need a Superbowl Party's worth of time for recreation, you can go watch the game. If you hold by the Rema, you can even have a beer or two.