If you're looking for plays with both male and female characters, but 5 or less male parts, may I reccomend Neil LaBute's "The Shape of Things," Patrick Marber's "Closer" (though with the movie coming out God knows what royalities will be) and, if you're slightly risky, David Mamet's "Sexual Perversity in Chicago."
With just a male cast, the only one I can think of right this second is "Art."
There's always room for pathos - and jazz hands.