Philly.com – Jamie Kerstetter is in her pink slippers with the pom-poms. And why shouldn’t she be? It’s a Sunday morning, and she’s settling in to a long day during which she won’t leave the apartment. The cards are dealt, on the screen, four tables going at once, a far cry from the 20 poker games this former tax lawyer used to fire up on her computer screen in Mexico, where she would spend hour after twitchy hour playing online Texas hold ’em. “My boyfriend and I would sit all day and not talk to each other except when one…