The Royal Sonesta Houston Galleria is the CLEC 2018 headquarters hotel:

2222 West Loop South
Houston, TX 77027
 
For reservations by phone, call (713) 627-7600.  Be sure to sure to mention ASCLS.
Room Rates:
 
Single/double accommodations:  $189 per night plus tax and fees
Triple accommodations:  $199 per night plus tax and fees
Quad accommodation:  $209 per night plus tax and fees
 
Deadline for reservations is January 30, 2018.