There is a cafe there its called Reflections at Rookwood. I went there just after it opened and wasn't that impressed, but Im fussy. (I think they should make up thier mind, florist or cafe, not both!)
From the website:
Bookings essential for groups of 8 or more.
Tel: 02 9764 6088
Fax: 02 9764 6188
Location: Memorial Ave (cnr Necropolis Drive), Rookwood NSW 2141
Mail: PO Box 4, Lidcombe NSW 1825
Trading Hrs: 7.30am - 4.00pm daily
Kitchen closes at 2pm sharp (coffee & cakes still available until 4pm)
Kitchen is closed on public holidays (coffee & cakes still available)