Directions from town: Come down the Pali Highway all the way across the bridge and bear right at the SECOND intersection (NOT the one right after the bridge). Keep going past Macy's and Starbucks, past the playing field, untill you see a LDS Church on the right. At the next light, turn left toward the ocean until the road spits as it approaches Kalaheo. The Beach Center is the big parking lot on your left.
Coming from Leeward/Central/Pearl: Take the H-3 to the last exit - "Kaneohe Bay Drive" - go around the loop and turn left toward Kailua. Keep going straight for 3 miles (you're now on Kalaheo Ave.) until you see the green Kalapawai Store on your left. Turn right immediately onto Kailua Road and the Beach Center is the next driveway on the right.
Once you're in the parking lot: On the left side of the front building is a sign that says "Sweet Shop". Go down the arcade to the end of the tunnel and turn left. The Eco-lounge is on the right.