Even for music fans, leaving the house on an icebound January night to catch a live show takes a certain amount of grit and determination. That and simple faith—the hope that after making your way through streets so cold that the sidewalks ring under your heels, you’ll hear something hot enough to justify the trip. A band that can turn up the heat acts as a steam valve, releasing the explosive pressure of a month or so of built-up cabin fever. Saturday night at the Press Room, King Memphis provided abundant BTUs with three solid sets of rockabilly rhythm.

King Memphis front man Matt Robbins took command of the stage with cool authority, a laid-back balance to the sparks thrown by bassist Kris Day (also of the Jerks of Grass) and drummer Dave Ragsdale. The backing musicians’ fast and fiery styles suit the material just right. Strong originals like the fuzzy “Flat Black Cadillac” and the Commander-Cody-esque “Thinking about Drinking” settle firmly in the rockabilly tradition of songs about various kinds of engines, women and dangerous behavior.

Monotony is sometimes a danger with genre acts, but King Memphis incorporates blues, surf, early rock and straight-up country to serve up an unpredictable mix that kept the dance floor packed. Diverse covers delivered plenty of variety, drawing on Dale Hawkins, Johnny Cash, ZZ Top and fellow rockabilly groups like the Donettes.

Celebrating the recent homecoming of his stolen guitar—a gorgeous 1972 Les Paul with a dark red finish and gold detail—Robbins showed off accomplished chops. Using much more of the fingerboard than your average rocker, he layered rhythm, melody and fill, keeping the sound fresh with varied vintage effects. His style is witty and inventive, making the most of the snappy bass and driving snare. Robbins does double duty as lead vocalist with good range, including a Cash baritone when needed. The songs on Saturday ended clean, with strong flourishes from all three players in tight, focused arrangements.

Activity overflowed The Press Room’s tiny floor as dancers shook off winter lethargy. The band’s irresistible toe-tapping, chin-bobbing, table-drumming tempos broke into an elaborate display of dance styles, including cha-cha, blues, jitterbug and even some Gidget-inspired hip wiggling and ponytail-flailing.

King Memphis creates high energy that demands such a crowd response. The venerable Portland band, now in its 16th year, was declared Best Roots Act of 2007 by the Portland Phoenix, and plays a steady monthly gig at Bull Feeney’s. The group deserves a following here, as well. A few desperate calls for an encore at the end of the show were a good sign that more fans are gravitating into the growing Seacoast torch-and-twang scene. That’s good news for homegrown talent, too, and promises a great turnout next time King Memphis’ long black Cadillac pulls into town.