there are rooms for as small as 30 persons and up to 600 persons for combined rooms.
as of 2007 here are their rates:
one function room - 30pax - P6,600++
club cafe - 50pax - P7,500++
combined rooms - 100pax - P19,800++
combined rooms - 120pax - P16,500++
combined rooms - 150pax - P26,400++
combined rooms - 200pax - P38,500++
i'm not sure if there has been an increase. also, you will need a sponsor, which i think party planners can do for you.