The risk of occurrence of clusters is particularly high when the “Three Cs” overlap.
1.Closed spaces with insufficient ventilation
2.Crowded conditions with people
3.Conversations in short distance
Read more information from here :
https://www.mhlw.go.jp/stf/seisakunitsuite/bunya/newpage_00032.html
KING
Reviews
The attraction is that you can drink all-you-can-drink for one hour at 1,000 yen. We put one bottle and two people could drink it for about 10,000 yen. It is easy to come for a drink at a second party and the atmosphere is easy to enter. The capacity of the store is quite large and the space is large enough for groups to enter. I think it's supposed to fit up to 40 people. It was easy for women to enter, and even straight men and women could feel free to drink it.