Winterset--Maxwell Anderson's urban plea for justice and young love. Closing on Saturday night at the Loeb, 64 Brattle St.

Angel Street--Victorian mystery-drama--or so they tell me. At the Cambridge Acting Company, a/k/a The Hasty Pudding Club, Holyoke St., Friday and Saturday at 7:30. Brother Blue '48--Storyteller supreme, complete with feathers. Saturday and Sunday at 8 at Emmanuel Church, 15 Newbury St., Boston.

Triple Play--three one-act plays by John O'Brien at the inimitable (and unpronounceable) Teatro Nucleo Eccletico, 37 Clark St., the North End, Friday and Saturday at 8:30.

R--by C.U. Peters, at the Tufts Arena Theater, Medford. Call 623-3880.

The Decline and Fall of the Entire World as Seen Through the Eyes of Cole Porter--The definitive-obscure Porter song revue. At the Charles Playhouse III, 74 Warrenton St., Boston.

The Rivals--Sheridan's biggie, at the Publick Theater, Soldiers Field Road, Allston, Friday and Saturday at 8:30.