Some arts organizations are offering discounted admission today; others remained closed. Keep checking this post for updates.

Open:

Theater J is offering $20 tickets to Our Class tonight with the secret word “Sandy.”

Comet Ping Pong is hosting a last-minute horror movie at 8 p.m.

Tonight’s Heartless Bastards show at Black Cat is still on!

Arena Stage opens at noon; One Night With Janis Joplin happening as scheduled.

Politics & Prose opens at noon today.

The Kennedy Center opens at noon today, and all performances are still on.

National Museum of Crime & Punishment is open from 11 a.m. to 5 p.m. with $10 off admission.

Kramerbooks is open, and its cafe opens at noon.

Som is open from noon to 6 p.m.

Closed:

U Street Music Hall closed; the Grouplove after-party has been postponed.

Round House Theatre (in Bethesda and Silver Spring) still closed

Atlas still closed

Folger Library closed

The Smithsonian museums and the National Zoo remain closed

The Writer’s Center is closed

Sixth & I’s offices are closed and tomorrow’s Ina Garten event has been postponed to Dec. 12

The Phillips Collection is closed