Bounce, if you're planning on going to the Rangers game, my suggestion would be to check out the American Grille. Depending on how much money you want to spend, you can get a table right against the glass, or something that's just standing room equivalent in the bar area. I've been up there several times, when it was tea TGI Fridays, and it's a great way to enjoy a game.
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Also, if you guys are into golf, you might check out the Cowboys Golf Club. It's rated as one of the best courses in Texas and they have some pretty reasonably priced packages.
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As far as nightlife goes, the best thing to do would be to check out the Dallas Morning News' Weekend Guide, or the Dallas Observer online. Both of these have listings of bars, restaurants and events in the area.
GuideLive-
Dallas Observer-
Hope this gives you a good starting point, and if you need more specific information, shoot me a PM, and I'll be happy to answer further questions.