Are you part of the Baltimore or San Francisco diaspora? Then get out there with your bretheren and support your team!
Ravens fans will be descending on Fizz (3220 N Lincoln Ave.), the official bar of the Ravens Meetup Group. I've been going here throughout the season and it's sure to be a rowdy time.
There doesn't seem to be a 49ers Meetup group, but I know The Globe Pub (1934 W Irving Park Rd.) has a 49ers flag outside, so I'm sure there'll be some SF fans there. Yelp also suggests Cheesie's Pub & Grub (958 W Belmont Ave.).
Have fun and be safe out there, football fans!