It's located at one end of the "Freemont Street experience". My wife and I shared a green salad and a Pub Club sandwich. The salad and the sandwich was plenty big for both of us, let alone one person! This was 11:00ish on a Saturday night and the place was still filling up as we departed. There was also a nice two-man group playing; fun songs and not TOO loud so you could still converse. Hennessey's would be good anywhere, but compared to the rest of the pitiful offerings on Freemont, this is the only place to go.
If you own or manage Hennessey's Tavern, register now for free tools to enhance your listing, attract new reviews, and respond to reviewers.