Here is the info from that site:

Fri - Sun Mar 22 - 24 PFS SINGTIME FROLICS A weekend of music & fun! Janet Stecher (of Rebel Voices) is this year's featured artist. $60 per adult, $45 kids 4 - 11, 3 and under free. Send your name and address to: Portland Folklore Society - Singtime Registration, PO Box 1448, Portland, OR, 97207-1448 for more info

No "where", but there is a "when". I'm not going.