4 people (3 males, 1 female). KL is very hot -- check out the shopping centers because they are air-conned. Try the light show @ around 8PM at the garden near the Petronas Towers.
Insider Tip:Use public transportation, esp. the LRT (public rails), more than taxis -- taxis are expensive because many drivers choose not to turn on the meter and instead will haggle a price with you. Our taxi to Petronas Towers was 15 RM (so split among 4 people, it's not too bad at all) but keep in mind that the LRT over would have cost 1.60 RM each and if the man had turned on the meter it would only have been around 7 RM.