Justin Bieber -- You Can Dance and Drink ... But NO PHOTOS Please!!! (VIDEO)

Justin Bieber looked like he was having a good time and dancing with a group of girls ... but that came to a quick end when he got on the mic and lobbied for everyone to stop shooting him.

Bieber was in a bar in Rome ... and he looked like just a regular guy drinking a few beers and trying to mack on some chicks.

You see a bunch of people taking photos of Bieber ... nothing overly aggressive but lots of flashes.

At a point, it clearly bothered Biebs ... you see him grab the mic and ask people around him to stop filming him and just have fun ... he refers to the group of guys as "groupies."

No one was harmed in this shoot.