Ken is mostly right but Maple Leaf Card holders are supposed to get access to
AIR CANADA Maple Leaf
SAS Business Class
AIR NEW ZEALAND International Lounge
Koru Club Lounge
THAI Royal Orchid Lounge
Royal Executive Class Lounge
ANSETT AUSTRALIA Golden Wing
UNITED Red Carpet Club
LUFTHANSA Business
Frequent Traveller
VARIG Business Class
Notes:
Transborder boarding passes between U.S. and Canada are not considered to be international. (I don't know if this rule about intra NA access, ie RCC access only on true international flights, still applies to Maple Leaf cardholders as it no longer applies to Elite/Super elite, ie RCC access at any time, domestic or international flying a Star Alliance carrier).