Champagne overflowed and the players danced to the latest Hindi and Punjabi pop numbers sooner than they returned to their hotel on Birmingham's upmarket Broad Street late in the evening.
The final, reduced to just 20 overs a side, had started six hours late after rain ruined most of the day game.
Several fans followed the team bus to catch a glimpse of the star players as security guards kept them at safe distance.
Sources said the organisers were worried after British Tamils had protested during the India versus Sri Lanka match in Cardiff last week.
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Team manager Ranjib Biswal said:"We let the boys have some fun. We had generally kept ourselves away from public eye and concentrated on the cricket, but Sunday night belonged to the boys. They won a terrific final and deserved to let their hair down."
The Indian team will be travelling to the West Indies on Wednesday for the tri-series.
The absence of senior players in the squad, skipper Mahendra Singh is the senior-most at 31, let the young players have some "extra fun".
"But no girlfriends were allowed," a team source informed.