Yes, Katsu is open everyday a year

Actually yes but depends on, i was there several times and one time yes and others not

Your hotel is outside of the city ring of Amsterdam, the part on the map within the A10 road. However, Amsterdam is not so big and with tram and metro transportation, which is pretty good in Amsterdam it is not so far and one of the first city center parts (de Pijp) that you will encounter on the way from your hotel into the city.

Hi David, You are not under any obligation to buy and consume in the shop. I have noticed many customers who simply buy and go consume elsewhere. It all depends if you like the vibe of the shop. If you do decide to stay, some shops may ask you to buy a drink but its not mandatory in all shops. Have fun.

Tram 16 and 24 run from Amsterdam Centraal to Albert Cuypstraat. Then it's a couple of minutes walk from there. I would suggest visiting on a weekday so you can also visit the outdoors market of Cuypstraat. You can also walk but it will take you around 35-40minutes.

Friday and Saturday night....indeed 01.00