Littwin is miserable in class and should do herself a favor and take private dance lessons, where she will not be distracted to critique other members of her class. The fact that she allows a locker key pinned to the shorts of another class member to irritate her underscores her pettiness. Unlike Littwin, not everyone who attends aerobics classes thinks he is perfect. Many of us attend for cardiovascular exercise to improve as well as to maintain our stamina and coordination. A group workout offers everyone a higher level of enthusiasm, spirit--and fun.