By Nathan Frandino OAKLAND, Calif. (Reuters) – Walking into the Good Hop craft beer bar in Oakland, California, Alison Heller looks like any other patron thirsting for happy hour. But instead of heading to the bar, she goes straight to the bathroom, opens her backpack and pulls out a plastic bag with fentanyl test strips. She puts 25 strips in a jar for anyone to take for free. “If you’re going to use drugs here, you can test them,” said Heller, a co-founder of the harm-reduction nonprofit FentCheck. Strips to test drugs for the presence of the deadly synthetic opioid are becoming more commonp…