50.
Non-hispanic minorities beware
I've been to ACI a few times and I've noticed this. If you're white or Latino (and under 50), you're pretty much guaranteed steady action all night. For everyone else, it's a toss-up. Some nights will be great, but some nights you probably won't get any action at all (unless you're prepared to settle for guys you might not be interested in on a good night). Either way, you're guaranteed a lot of rejection. That's how it goes for people of color in San Antonio, I guess