No Marco Polo. No kids taking short cuts through the lap lanes. No lifeguards shouting at rule-breakers -- only Head Guard Chris Spurrier (pictured here), respectfully monitoring. It's the ultimate "adult swim" at Maplewood's town pool. The "Commuter Swim", part of the summer routine for over a decade. It starts at 6:30 every weekday, attracting up to 30 swimmers for an uninterrupted hour of swim. "My workout motivation is gone by 9 a.m.," says Marianne Lloyd, a Commuter Swim loyalist who's