If it ain't broke, don't break it. Too many dive bars get an influx of college kids and decide it's a good idea to remodel the joint to please their new clientele. Oops, now you've ruined the reason people came here in the first place. Not the Sligo, a Somerville dive classic. Tufts kids and Davis hipsters drink cheap pints side by side with old locals. The beat up bar and wooden tables have...