Jack Grealish, who has struggled for form with Aston Villa this season, was filmed at a nightclub with friends
Champagne bottles and sparklers arrive at the group's table in Manchester nightclub Panacea
Another party goer is seen inhaling a substance through a balloon, believed to be nitrous oxide
Wednesday is usually a day off but Garde changed the schedule last week for the entire squad in response to Villa's alarming plight and in a desire to shape the team in his image as quickly as possible.
Grealish's absence from the first-team picture could continue on Thursday and Friday and his place in the match-day squad of 18 for the visit of Watford on Saturday is in doubt.
Footage obtained by Sportsmail showed Grealish enjoying a boozy night in Panacea nightclub on Saturday, complete with champagne and sparklers. A friend appeared to inhale from a balloon believed to contain nitrous oxide – commonly known as laughing gas or hippy crack.
Grealish also partied with friends at a Birmingham hotel on Sunday evening before training on Monday.
Blessed with great ability, Grealish shot to fame by starring in Villa's FA Cup semi-final win over Liverpool at Wembley and the club's successful fight against relegation last term.
But he attracted the wrong attention last summer after being pictured apparently unconscious on a street in Tenerife following a night out and Villa chiefs explored the possibility of installing a mentor from the senior group of players.
This season Grealish has not kicked on and Garde said before the trip to Goodison Park that he was 'unfinished', adding: 'Jack for me is a very gifted player with a lot of skill and quality but what I saw in the last few games he played was not the level he should have played. It is as simple as that.'
Grealish played 74 minutes of Aston Villa's 4-0 defeat by Everton on Saturday before heading out to party
Grealish (far left) pictured leaving the pitch after full-time at Goodison Park following Villa's humiliating loss
Villa boss Remi Garde faces a daunting task in trying to haul the club off the foot of the Premier League table
Garreth⚽️Breen
no any in wembly, try uxbridge or slough though thers plenty
It's a year-long (or 10-year-long if you were one of the people who got there early enough) season ticket. You basically get the seat for any event at Wembley for a whole year.
It's a terrible idea because not everybody wants to go to every event, meaning some big events have lots of empty seats, for example the play-off final today. It makes the stadium look bad and denies fans a ticket.
Everybody wants to see Champions League Finals but nobody seems to want to watch the FA Trophy final.