Muriel Haverstein will perform next weekend at the Rockland Congregational Church. From her appearances in the all-girl jazz group Estelle and the Brunettes in 1942 to her touring with her own trio, Haverstein has been playing jazz piano for seven decades. She will appear at 3 p.m. Sunday, July 10, at the church as part of a fund-raiser. Donations of $8 are requested. Call 594-8656.