If you're aching for a folk remedy, you can find it this weekend at two festivals.

* At Lisner Auditorium, two dozen or so folk singers and groups will take to the stage this Saturday to pay tribute to local DJ Dick Cerri. Such well-known artists as Kate Wolf, Tom Rush, Jonathan Edwards, Cathy Fink and Dave Guard, a member of the original Kingston Trio, are scheduled to help Cerri celebrate the 25th anniversary of his radio show, "Music Americana." Bands on the bill include Mountain Laurel, the Seldom Scene and Schooner Fare. The evening show is sold out, but tickets for the 2 p.m. performance are still available for $15. Lisner Auditorium is on the eorge Washington University campus, 21st and H streets NW. Exit Metrorail at the Foggy Bottom station from the Orange/Blue lines. Call 244-1543.

*The Folklore Society of Greater Washington is sponsoring its 14th Annual Folk Mini-Festival this Saturday at Takoma Park Junior High School. Activities from noon to 6 include traditional music, dance, storytelling, crafts and workshops. After a two-hour break, the festival continues with two main evening events: a square dance from 8 to 11:30 and a sampler concert from 8:30 to 11:30, which offers storytelling, string bands and a special appearance by gospel singer Helen Schneyer. Takoma Park Junior High School is at 7611 Piney Branch Road, Takoma Park. Tickets are $10, $8 for FSGW members, and are good for the entire day and night. If you want to catch just the daytime activities or the evening shows, tickets are $7; $5 for FSWG members. Call 281-2228.