I came to Osso with a friend for the after-hours atmosphere and had drinks only. I was a little surprised to see the bouncer smoking a cigarette as it seemed like a nice/classy place and that just didn't seem very professional. I will say he was extremely friendly and talkative.
Inside was really nice and it definitely had a fun-lively entertainer (a man playing some serious bongos along with a track). It evoked kind of a Latin-vibe but this could have been the musics doing. This definitely is a place that attracts women wearing their tightest dress and biggest heels on a Wednesday night... hey mamas gotta pay the bills I suppose. That part was a little weird.
I will say the music was cool so that alone earned a few stars. As far as a bar It wasn't my cup of tea, but I save my 3inch stilettos for Vegas. That being said, I'll come back during dining hours and update based on the food rather than bar atmosphere.