Aww that’s a bummer, I was going to recommend Museum of COntemporary Arts, one of my favorites.
Stuff to look at hmm… I’m not a big sight-see-er, but try the hike to the Hollywood sign if you’re into that, gives a nice view of the whole city on both sides of the mountain. I’d avoid Hollywood, unless you are into really touristy/kitschy stuff.
You can also hit the beaches, I’d recommend Redondo - less toursity but has a nice pier. That being said, a walk from Santa Monica to Venice beach can be nice to see all the waves of tourists, folk artists selling cheap goods and pot stores.
If you’re into drink, I like bar hopping around downtown for Happy Hour. Beelman’s Pub is my favorite and The Falls is just next to it too. There’s also The Library which is decored exactly as it sounds like and has good drink specials. Casey’s is another great Irish pub with ping pong, fusball, darts, and tons of great Irish drinks! And stop by BUZZ, a wine shop that has a little bar in the back with beer flights and whatever-wine-we-got-open for like $4 a glass. And all of these are within walking distance!
While you’re in Down Town, stop by The Last Bookstore, a neat little shop which second floor feels a bit like something out of Harry Potter when you first enter Check out DownTown independent that does free Comedy Shows. Really there is a free comedy show going on every night somewhere in LA so just google that for the days you’re there. The downtown art walk is also nice but only happens once a month so you will likely miss it, I think it’s 2nd thursday of each month or something.
For food, aside from Taco trucks, I can recommend my own hood of KoreaTown where you can get some LEGIT Korean food coooked by old asian grammas who barely speak english. Try something that isn’t generic pancake, bbq or tofu soup, such as gamjatang (pork+potato stew), hangover soup or squid. Try restaurant"Cho Mak" or “Mapo”, two of my favorites. Stop by “DGM,” “Go Pocha” or “2nd Floor Soju Lounge” for authentic Korean Pub experience (come with friends and bit hungry, it’s more of a sit-down get-food-and-booze type thing). Order makkoli, soju (ask for raspberry vinegar to add to it, called “honcho” - sounds weird but is delish) or some [som-eh] (beer + shot of soju)!