Olive Tree Cafe   There's no doubt about Olive Tree's popularity just try to find a space in the parking lot. Somehow, democratic politeness prevails over anarchy as customers patiently wait for seats inside and out and line up for plates of creamy taramasalata (citrusy carp-roe dip), soothing bowls of avgolemono soup, mussel ceviche, falafel platters and fresh fish souvlaki plates handed over a counter by artsy, alternative types. Send someone in your party to grab a bottle of Greek wine next door at Oliver (by the same owner, Savas Mojarrad).  4614 Kilauea Ave. behind Kahala Mall. 737-0303. 5-10 p.m. daily. No credit cards. Checks accepted. $