Watch party at the. West gate is good. Plenty of seating and a huge sports book.
If you want something more high-end/luxury, some of the strip casinos have events where you pay for an open bar/buffet and watch the games. All the sports books are packed. Planet Hollywood has some event that might be free, I'm not sure.
Place your bets the night before or early the day of the games if possible. Lines to place the bets get to be very long. Some of the places have some kind of online betting app (I don't know much about but will try it next time).