Sudanese reggae musician Dynamq, above, And The Nile Girls will present a night of reggae at 8 p.m. Friday and Sunday, April 28 and 30, at the Center for Cultural Exchange in Portland. Concert proceeds will benefit a fund to build a library in the Sudan. Besides playing shows with One World Tribe, Dynamq tours with reggae star Eek-A-Mouse and is working on a solo album. For tickets, $15, call the Exchange’s box office, 761-1545. The Exchange is at 1 Monument Square, Portland.