I recently stayed at the Renaissance Long Beach for a week during a conference at the Long Beach Convention Center. Even though it is not the "attached" conference hotel, I actually greatly preferred it over that and the other locations my friends were at. This is because it is still very close to the LBCC (just across the street), but being on the north side of the street, it's actually closer to a lot of the breakfast/coffee shops ("Its a Grind" is good), nice dining venues ("L'Opera"), and other night life ("Congregation Ale House", "Beachwood BBQ", "Rock Bottom", etc.)
I also found the staff quite enjoyable and accommodating. They were particularly helpful with splitting up a difficult room bill (I had a friend come share the room with me, but only for a few days, and he needed a receipt showing he paid half for each of those nights). There is even a Starbucks downstairs!
Oh, one tip: there is in-room coffee, they just hide the coffee pot away under the nightstand. Took me a few days to figure that out.
One major ding: wifi is not free in the rooms. Someday hotels will figure that one out. I mean, c'mon, it's not like they have a coin slot on the hot/cold water faucets ...