From FaceBook event page:

Tap Takover time at Mojos! Thursday the 31st Terrapin Beer Co will be taking over our taps. Free terrapin glasses while supplies last.
Draft Selection:
Sound Czech Pils 5.2%
Hopsecutioner IPA 7.3%
Hi-5 IPA 5.9%
Smoke on the Porter 8.5%

Starts at 8 pm. I will add that Terrapin has previously sponsored the RVA Environmental Film Festival.