BelkaCTF #6: Bogus Bill

BelkaCTF #6 is over, the gang of money forgers is all caught. Thank you for being a part of this! Congratulations to the winners:
Student track: its5Q, belkakaka, kiwi
Professional track: sinsa, sm233, teo4n6

đź“„ BelkaCTF #6: Bogus Bill write-up

The boss looked as pleased as punch. Trying to hide his self-satisfied smirk, he took cover in the cloud of smoke from his cigar. As a token of recognition for his past merits, he was still allowed to smoke in the office.

—Chief, I know you like the back of my hand, a stroke of genius has struck you—so spill the beans!

The boss waved his hands, dispersing the smoke.

—Kid, what do you do when you finally achieve something you've long been after?

I looked at the boss perplexedly.

—Umm... well... I'll go take a nap.

The boss frowned slightly.

—What's up with the younger generation, darn it. You'll go have a drink!

—Hmm, what do you mean?

—I mean, we'll take the recordings from the cameras and catch the whole group!

—Genius, boss!

Tricky
643
Party
Solved 14 times

Where did the gang go to celebrate their success together in March?
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