Spooky coffee trailer Gravves this weekend will bring its caffeinated concoctions to a brick and mortar shop near San Antonio College. The coffee spot will open Saturday, Sept. 2, at 2106 McCullough Ave., just a few blocks from its previous post on the St. Mary’s Strip, a Tuesday Instagram post notes. Gravves will sling its alternative drinks — it’s known for velvety caffeinated concoctions using Southeast Asian flavors such as pandan plant and nutty taro — from 8 a.m.-2 p.m.