It's a good question, but a huge one. Lucky for us another source, namely the Las Vegas Review-Journal, has already done the leg work.
Every year the RJ does a round-up of which bars support which teams and what their football specials are (food, drinks, giveaways, etc.) So rather than reinvent the wheel, here's a link to the latest list: www.reviewjournal.com/lvrj_home/2005/Sep-04-Sun-2005/living/2871834.html
Since we didn't do the research, we can't guarantee that the list is comprehensive or accurate, so if you spot any errors or omissions, please let us know. For example, we note the absence of one of our favorites, namely the Centerfold Lounge, a Detroit Lions bar located at 1024 N. Boulder Highway, Henderson (near Warm Springs Road), 702/564-7865. It's actually a strip club, but that's not the draw for us: We go for the food specials during Lions games, which include Kowalski hot dogs for $1 and Kowalski Polish sausages for $2.