LAHSO have been in use very frequently when I have used KLGB so its worth getting your instructor to go through them with you during your check.
Its also worth noting that during your check/BFR at Rainbow that if you intend filing IFR they may give you a quick check out on that as well to make sure you arent a donkey in the air. Its worth doing anyway especially if you havent flown it for a while or you are new to the US ways of doing things.