Absorbing the atmosphere of a place

For this I sat in a pub for two hours. I decided to try drawing people, I haven't really worked like this before and wanted to challenge myself. I feel the above sketches have some good aspects like the abstract look of the faces, however I don't think they work overall.

This image is part of an argument in the pub, I made it more basic using one continuos line. i feel this approach gives more impact, I'm going to try further this idea working in the same style.