Usually, I will bring oversea guests to at least take a look at the spectacular view of Sunway Pyramid shopping mall at night:
Especially during festive sessions like Chinese New Year, Hari Raya, Deepavali and Christmas, the surrounding areas leading to Sunway Lagoon Resort would be beautifully decorated. Do go about 7 or 8pm at night to have your dinner- if you want more reasonably priced food, you can have it at the shoplots located around Sunway Pyramid.
Afterwhich, stay till it is dark and you can walk around Sunway Pyramid towards the hotel and enjoy the night scenery.
Public Transportation from Sunway Pyramid
For public transportation, there is the Metrobus that goes all the way to Pasar Seni (Central Market) in Kuala Lumpur. Else, you can take a cab to the KTM Subang Komuter station- from the Komuter, you can go to KL Sentral hub. Putra LRT station is located quite far away.