I stayed at this AirBnB during a conference at the Convention Center with 2 colleagues. This place was great for this purpose. Plenty of sleeping space, there were 3 of us and the sofa bed + 2 rooms was nice. The place is well stocked for comfortable stay, having everything we needed in the kitchen and bathroom. Highly recommend this place.
Getting to the convention center / downtown long beach was very easy and quite fun on the electric scooters.