Forget New York or Los Angeles. If firms are looking to charge firm-friendly rates for in-demand work, they may want to open up shop in North Dakota or Pittsburgh — and of course be ready and able to do work for the natural gas industry.

According to marketing consultant Bob Denney’s midyear update to his annual “What’s Hot and What’s Not in the Legal Profession” report, the “shale rush” has made places like Pittsburgh and North Dakota hot legal markets, with Houston also generating energy work. Denney said five outside firms have opened in Pittsburgh in the last six months.