Nate, I don't know the address but it maybe in the phone directory. I'll PM you Cary's phone # he can probably give you directions.
G-Cues is actually a pool retail/repair shop. They've set up two 9' Diamonds, one 9' Brunswick (similar to GC but black w/ chrome), one 7' Diamond bar table, the snooker table and the 10' Diamond for players. All but the snooker table have blue Simonis cloth. No music, no beer, no smoking, no crowd. Seems to be only serious players (Duffy said "the best players in San Antonio"). You might like it.