There’s something about having a birthday party at a place that was really designed for grown-ups that makes a kid feel, well, grown up. Perhaps that explains the popularity of uptown’s Strike City among birthday boys and girls. Or maybe it’s the private party rooms with up to four bowling lanes and a big-screen TV. Or the adorable birthday cakes supplied by Cloud 9 Confections. Or the cheese pizza, hot dogs, and French fries. Or the private bar, where parents can relax while the kids celebrate. Yep, we think that’s it.