Ashidematoi’s top 3 popular alcohol are lemon sour
(vodka with lemon flavored soda), shochu, and highball (whiskey with soda).
Order a bottle of shochu/whiskey/or other alcohol when with large groups.
If you’re a heavy drinker, ask for a mega size (trust me your bill will be cheaper than normal).
If you want to have a long night talking with locals then just order the regular size.
Of course they have non-alcohol & soft drinks as well for those who can’t handle alcohol.
They have nibbles available for you to share with friends or neighbors.
If you’re a little hungry, I suggest you order their Grilled Sandwiches (also known as Toastie).