Yuseff Lateef begins a seven day stint at the Jazz Workshop. It is hard to predict where Lateef and his several instruments will take you. His last record, "Part of the Search," was a commercial, nostalgic attempt at the Swing music of the Thirties. It's probably a good idea to listen to WBCN's latest broadcast tonight before you shell out your money.

The Persuasions are next door, at the more expensive, streamlined Paul's Mall. Their perennial boast, "We still have no Band," went under with their last recording. Occapella still prevails, however, and they are very entertaining. They may invite the audience on stage to sing with them, but don't be surprised if they have vanished by the end of the song.

Joe Val and the N.E. Bluegrass Boys are picking Tuesday night at Passims. They begin at 8:30 and for two dollars, it seems you can stay for both sets. They feature a guitar, mandolin, banjo and stand-up bass, though no fiddle.

The United States Army Field Band and Soldier's Chorus will perform at the Hatch Memorial Shell, Charles River Esplanade, on Tuesday at 8 p.m. The male chorus is reported to be exceptional, and if it is a clear night, Boston is dazzling from across the river.