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It's like deja vu all over again ... Johnny Manziel hitting the Hollywood nightclub scene (again) -- this time, leaving 1 OAK on the Sunset Strip around 2 in the morning.

TMZ Sports has the footage of Manziel leaving the club with a group of people early Wednesday morning ... this, after partying his face off at the Ace of Diamonds strip club the night before.

Manziel's been on a tear over the past couple of weeks ... partying in Vegas over the weekend with his new pal Scott Disick and raging in Miami before that.