One stop on the Yamanote line from Shinbashi, Hamamatsucho is almost as business oriented as its more well know neighbour. It’s saving grace is its proximity to the sea (where you can board a cruise of tokyo bay) and to the green expanse of Shiba Koen. Like Shinbashi, there are lots of ‘salaryman’ oriented bars and izakayas with cheap and abundant beer, sake and shochu.
All the budget ways of getting into town. UPDATED with COVID-19 info.