I'm coming up with 27 in 6 states and 2 continents -
NJ(2): Ski Mountain Pine Hill (NELSAP), Vernon Valley/Great Gorge (I'll count as one)
PA(9): Camelback, Shawnee, Jack Frost, Big Boulder, Roundtop, Liberty, Blue, Elk, Bear Creek
NY(6): Hunter, Belleayre, Windham, Greek, Whiteface, Gore
VT(6): Killington, Stratton, Sugarbush, Okemo, Stowe, Mt. Snow
UT(2): Deer Valley, Park City
CO(1): Steamboat
EU(1): Kaprun/SellamZee
Hope to add a few more this year - a few that i'm ashamed to say ive never skiid but really have to: Jay, MRG

XC:
groomed/pay to play (2): ? Catskills NY, Greek Peak NY
bc/xc (4): Monacacy PA, Jacobsburg PA, Botheration Pond NY, Stratton Pond VT