I like Ippashi, a good izakaya with moderate pricing (plan on Y7,000 PP).
https://maps.app.goo.gl/8Z8VzNzCUsKKbmVu9
https://tabelog.com/tokyo/A1301/A130103/13224766/
(Other favorites of mine in Shimbashi are Shimizu for sushi and Hirosaku for kaiseki, a great value at lunch)