Boston Bar to Watch SMU Saturday

I will be in Boston next Thursday through Sunday and am looking for a good place to watch the SMU game with my son. I looked for tickets, but the only areas where I could get two seats together was in the nosebleed sections so I decided to just go to a bar. My son is only 19, so any suggestions would need to keep in mind that I will have a minor with me. My preference would be a nice cigar bar to watch the game, but every place I have found requires that you be 21 to enter.
Thanks in advance for any suggestions.
Thanks in advance for any suggestions.