Most semi-upscale brewpubs (e.g., that serve their own microbrews) will have at least a few reasonably healthy options. An acquaintance in the business says that men will come as long as the beer is good, but women won't (and, eventually, no women => no men). Brewpubs can't survive unless they serve food and drinks that non-beer drinking women will enjoy. So, most will at least have grilled chicken sandwich (skip the bun & sauce), shrimp skewers, chicken satay, and salads, salads, and more salads.
OTOH, if it's a "brewpub" that only serves budmilloors, you may be SOL. Eat before you go.