Johnny Manziel Partying After NFL Draft -- Champagne Fights and Hot Chicks

Johnny Manziel was PARTYING like the #1 pick in the NFL Draft last night ... raging his face off at Avenue in NYC with a bunch of stars, booze and super hot chicks ... and TMZ Sports has the footage.

Sources at the party tell us Manziel and his entourage hit the club around 1 AM where they had a private room upstairs.

We're told Drake was there (duh) ... along with Busta Rhymes, Meek Mill, NBA star Kyrie Irving and fellow 1st round draft pick Odell Beckham Jr.

The guys had a blast -- spraying champagne, dancing and having a great time until almost 5 in the morning.

Hey, you only get drafted once ...