The Rothko Chapel is an Elysium, the most commonly used for gatherings, as the Galveston Opera House requires a bit more travel time.

The adjoining Menil Collection museum is always opened when announced gatherings are held at the Chapel, but it is not strictly Elysium. However, the Master would generally be quite displeased at violence occurring near the artwork.

http://www.rothkochapel.org/
http://www.menil.org