DOCTOR NIGHTLIFE thinks 1991 is apt to be a TADD quieter (Taxes Affect Drinking and Driving), and thinks it's probably just as well. But the fun goes on: FRIDAY

PHEROMONES REVUE, TWO -- Tired of commercially successful ventures? Join the crowd and support your alternative entertainers. (This is a trick invitation.) The Pheromones' second showcase of pop-relevant -- but not reverent -- recession-proof cabaret at the Cedar Lane Unitarian Church features the Celtic/eclectic Ironweed, the acoustic-eclectic AV, escape artist Harley (is that a getaway joke?), comedian/song parodist Jim Tam and the Phero-nomena themselves ($12.50, 800/448-4686). SATURDAY

TRUTH, JUSTICE & THE COWBOY WAY -- Those rangers of traditional Western music, Riders in the Sky, return to kick off the Alden Theatre's spring season in true-blue, white-hat style -- a special little buckaroos show at 1 ($4.50) and then a grown-folks roundup at 8 ($14, students/seniors $12.50; 703/790-9223 or 202/432-0200). BABY, IT'S COLD OUTSIDE -- Seven of the area's favorite acoustic/folk acts -- Hard Travelers, Pete Kennedy, Cross Country, Side by Side, Donal Leace, Russ Moss and Cornucopia -- join forces at Baltimore's Old Otterbein Methodist Church at Sharp and Conway streets) to benefit the South Baltimore Homeless Shelter ($10; 301/922-5210). SUNDAY

ALL SOULS' AND ALL STYLES -- Had you heard that All Souls by the Zoo (a k a All Souls Episcopal Church), that pretty little gothic ark on Cathedral Avenue just east of Connecticut, hosts lovely acoustic and traditional concerts? This week it's Baltimore's mixed-tradition Helicon, featuring guest vocalist/fiddler Freyda Epstein, formerly of Trapezoid. Admission ($5, $3 students and seniors; 202/232-4244) includes an old-fashioned cookies and punch reception afterward. MONDAY

PROVINCIAL FOLK -- Sanford Markley, Side by Side, Clishmaclaver and Lisa Jones & Bill Bromfield mix up the meters at the first Music Americana showcase of the year, at Ireland's Four Provinces ($5 benefits the World Folk Music Association; 202/244-0860). THURSDAY

DUKE DOIN'S -- Thursday's sessions at the International Association of Jazz Educators' convention, which this year celebrates Duke Ellington (through next weekend at the Sheraton Washington hotel), are free and open to the public. A limited number of tickets are available to evening concerts by such artists as Max Roach, Lester Bowie's Brass Fantasy, Louis Bellson with the Bob Mintzer Big Band, and Dr. Billy Taylor. Concert tickets are $15 at Ticketron outlets; to charge call 800/448-9009. For more information call 202/347-2604.

CHANGE OF PACE -- Songwriters/yodelers/storytellers extraordinaire Cathy Fink & Marcy Marxer play to a rare over-21 crowd -- because it's club policy -- at the Folkal Point at the Cacao Lane Restaurant in Ellicott City. Here's your chance to learn to yodel without embarrassing your kids ($8; 301/982-0686 or 301/922-5210). As to openers Nip and Tuck -- they're never embarrassed.