Subdued singer/songwriters Jacob Jeffries and Rachel Goodrich both write whimsical, clever tunes that have won them dedicated fanbases in a music fixated by the bigger, louder, and sexier. Fort Lauderdale's Jeffries (formerly known as Jacob Groten) plays jaunty, driving piano jams, while Miami's own Goodrich and her band favor swinging gypsy-jazz and folk-rock numbers steered by a ukulele, a kazoo, and her magical voice. Either one of these musicians could pack Transit on any given evening, so tonight has the makings of a mighty get-down.