Shinjuku Kabukicho: Izakaya
Alps (Shinjuku Kabukicho: Izakaya)
Open 5pm-9am daily.
late: Open late
Sun: Open Sundays

Alps isn't exactly destination dining, but sometimes it's good to know a place where you can just show up with a group of twenty people and no reservation. Plus they're open until 9am every night but Sunday! The Y1500 party menu supplies ample, decent-quality food, and drinks are surprisingly cheap. (Y500 table charge.)

Shinjuku Kabukicho
Shinjuku-ku, Kabukicho 2-35-2.
Tokyo Beyond Sushi - the guidebook
Tokyo Beyond Sushi
Explore the hidden side of Tokyo dining
Charcoal-grilled pork on skewers, udon noodles in curry-flavored soup, octopus dumplings, deep-fried beef cutlet -- there's a whole world of exciting food in Tokyo that food-loving visitors often miss out on.

This book will introduce you to more than twenty of Japan's favorite specialty foods that are less well known abroad, along with a guide to the best places in Tokyo to try them and expert tips on what to order. From
Sister sites:
Craft Beer Bars Japan
Bars, retailers and festivals
Animal Cafes
Cat, rabbit and bird cafe guide
Where in Tokyo
Fun things to do in the big city
Neighborhood guides and top-five lists from Tokyo experts
Barking Inu
Sushi dictionary and Japan Android apps

Venue listing from Bento.com2 Star Rating: may appeal to some readers