Io S.
Yelp
Not a lot to go on, so can't really commit to the fifth star, yet.
Popped in for a couple of beers. A nice draft selection, though they could stand to be a little colder. Slight hipster vibe, maybe, but during the day, it's a nice, relaxed place to hang. Seems clean. Limited food menu, but some nice sauces and rubs (apparently) for the wings, and they have other decent-seeming appetizers, a burger, etc. Simple menu, but often simple is good. Will definitely try the grub soon.
Bartender Dylan was on. I'm an old square and he's a young dude with a man bun, so I was skeptical (OK, prejudiced) in the way many middle-aged men are. But he turned out to be a super nice guy. Informative, without being too chatty.
I was one of three people in the place (odd time -- 2 p.m.) when I walked in, and was the only customer left when I walked out, so I can't vouch for service when it gets busy.
Lots of TVs. A pinball machine and one of those hunting video games, I think (unless it was Golden Tee -- I wasn't really paying attention). Didn't need to shake hands with the unemployed, so I have no intel on the cleanliness of the bathrooms, but my wager is they're OK.
Prices higher than at the Newtowne, but the place has definitely been updated a little more recently. Still, very confortable barroom -- not precious, like so much in Cambridge.