There's several. I see the bulk of my movies at the three closest, which are in easy walking distance.
AMC Pacific Place 11
Regal Meridian 16
The interesting thing is that these two are two blocks apart and they never compete on films. A new release will show up at one or the other, but not both. I prefer the AMC slightly, especially since they do super cheap pre-noon matinees.
Cinerama
Huge screen, great tech. Probably my favorite place to see a movie. they also have chocolate popcorn, which is the only snack I ever get at movies.
There's a couple other theaters close by I've never been to. One is called a Movie Lounge, so I think it's one of those dinner and a show dealies.
Somewhat further away is a real IMAX screen, which I try to go to for anything that actually uses IMAX footage. The Cinerama tends to look better otherwise, though, and is cheaper.
And extending out from there are a couple that tend to do indie cinema and film festival stuff.