<TABLE> <S> <C>

<PAGE>

<ARTICLE> 5
<LEGEND>
THIS SCHEDULE CONTAIN SUMMARY FINANCIAL INFORMATION EXTRACTED FROM THE
CONSOLIDATED FINANCIAL STATEMENTS OF GREATE BAY CASINO CORPORATION (FORMERLY
PRATT HOTEL CORPORATION) AND SUBSIDIARIES AND IS QUALIFIED IN ITS ENTIRETY BY
REFERENCE TO SUCH FINANCIAL STATEMENTS.
</LEGEND>
<RESTATED>
<MULTIPLIER> 1,000
       
<S>                             <C>                     <C>
<PERIOD-TYPE>                   3-MOS                   6-MOS
<FISCAL-YEAR-END>                          DEC-31-1996             DEC-31-1996
<PERIOD-START>                             APR-01-1996             JAN-01-1996
<PERIOD-END>                               JUN-30-1996             JUN-30-1996
<CASH>                                          22,426                  22,426
<SECURITIES>                                         0                       0
<RECEIVABLES>                                   26,555                  26,555
<ALLOWANCES>                                    15,758                  15,758
<INVENTORY>                                      4,181                   4,181
<CURRENT-ASSETS>                                55,162                  55,162
<PP&E>                                         321,897                 321,897
<DEPRECIATION>                                 156,724                 156,724
<TOTAL-ASSETS>                                 238,520                 238,520
<CURRENT-LIABILITIES>                           49,247                  49,247
<BONDS>                                        331,818                 331,818
<PREFERRED-MANDATORY>                                0                       0
<PREFERRED>                                          0                       0
<COMMON>                                           519                     519
<OTHER-SE>                                    (157,057)               (157,057)
<TOTAL-LIABILITY-AND-EQUITY>                   238,520                 238,520
<SALES>                                              0                       0
<TOTAL-REVENUES>                                75,217                 143,775
<CGS>                                                0                       0
<TOTAL-COSTS>                                   63,846                 122,861
<OTHER-EXPENSES>                                10,528                  20,845
<LOSS-PROVISION>                                   327                     894
<INTEREST-EXPENSE>                               9,351                  18,637
<INCOME-PRETAX>                                 (8,835)                (19,462)
<INCOME-TAX>                                      (508)                 (1,339)
<INCOME-CONTINUING>                             (8,327)                (18,123)
<DISCONTINUED>                                       0                       0
<EXTRAORDINARY>                                      0                       0
<CHANGES>                                            0                       0
<NET-INCOME>                                    (8,327)                (18,123)
<EPS-PRIMARY>                                    (1.60)                  (3.49)
<EPS-DILUTED>                                        0                       0
        

</TABLE>