Question 1

Where is Bar Lupin?

Accepted Answer

Bar Lupin is in Chuo, Tokyo, Japan. You can see its exact position from the map coordinates and the Street View link.

Question 2

Which scene of Bungo Stray Dogs 3 does Bar Lupin appear in?

Accepted Answer

Bar Lupin appears in OP4 of Bungo Stray Dogs 3.

Question 3

Can I visit Bar Lupin?

Accepted Answer

Yes. Bar Lupin is a real place you can visit. Check what it looks like on Street View before you go.

Question 4

Where was Bungo Stray Dogs 3 filmed?

Accepted Answer

Anime and manga are not filmed the way live action is. Their backgrounds are painted from photographs of real locations, and Bar Lupin is one of those real places (OP4).