• The SRU Dance Theatre will perform at 8 p.m. today through Saturday in Miller Auditorium at the SRU campus.

"Defying Gravity" features the work of three guest artists as well as Teena Custer, SRU dance instructor, and eight SRU student choreographers.

Tickets are $10 for the public and $5 for SRU students with ID. They are available by calling 724-738-4926.

• The River North Chicago Dance Company, celebrating its 20th anniversary season, will perform at 7:30 p.m. Feb. 5 in Miller Auditorium as part of the university's Performing Arts Series.

Tickets are $20 for adults; $18 for senior citizens and those age 17 and under, and $8 for SRU students. Call 724-738-2018.

Peter Robinson, one of former President Ronald Reagan's speechwriters, will speak and have a book signing at 7 p.m. Wednesday<B> at</B> the Pew Fine Arts Center at Grove City College.Reagan's famous call to Soviet General Secretary Mikhail Gorbachev to "tear down this wall" about the Berlin Wall in Germany was written by Robinson.Registration is required, but there is no fee. To register, call Brenda Vinton at 724-450-1541 or e-mail blvinton@gcc.edu.

Pitt's Repertory Theatre's production of Moliere's comedy "Scapin" will be presented Wednesday through Feb. 14 at the Studio Theatre in the basement of the Cathedral of Learning, 4200 Fifth Ave. Tickets can be reserved by calling 412-624-7529.Carnegie Mellon University• Hundreds of performers from CMU's School of Music will present its second annual Collage Concert, a dramatic event combining theatrical lighting, music and performance spanning six genres, at 8 p.m. Feb. 12 in Soldiers and Sailors Memorial Hall. Tickets are $15 for adults and $12 for senior citizens and students. Call 412-268-2383.• The Miller Gallery at CMU hosts "Experimental Geography," an exhibition by 19 artists and teams from seven countries, through Sunday.Admission to the gallery in the Purnell Center for the Arts on campus is free. Hours are noon to 6 p.m. Tuesdays through Sundays. Call 412-268-3618 or visit the Web site, www.cmu.edu/millergallery.