Lady Gaga, who performed here at Madison Square Garden last night and rocked the house with her “Monster Ball” tour, had just come from Atlantic City where she performed and stayed at a suite in the Borgata Hotel & Casino. Gaga, who stayed low key, entertained friends in her suite and tried her hand at Blackjack. When out of her outrageous and extravagant costumes, Stefani Joanne Angelina Germanotta is just another girl from NY blending in with the crowd.