On a recent trip to Las Vegas and an evening on Fremont we stopped in Hennessey's for a drink. It's basically a dive pub. After being on the strip for a few days it was a nice break. We only had a few drinks, but it looked like they had a decent happy hour on food, which looked to be mostly bar food. It has a cool vibe, especially since its in a giant glass of Bass. It's nice that there is a balcony where you can people watch the street, the lights, the zip liners and the crazy people eating at Heart Attack Grill. Service was decent. The place is a little dingy and service wasn't spectacular. However, if you want a dive bar, that's not at all pretentious to grab a few drinks, this fits the bill perfectly.