Everyone and his grandmother will probably be there, but this is the weekend of the Beethoven Festival at Tanglewood, and it shouldn't be missed. Eugene Ormandy will conduct the Philadelphia Orchestra in five of Beethoven's nine dramatic symphonies, and the cycle will be nearly completed on Sunday afternoon when the Boston Symphony performs two more. If you've been dying to get out to Tanglewood but lacked the means, you'll be in luck Sunday--the Cambridge YMCA is sponsoring a bus that will leave in the morning, drop you at the festival doorstep, and depart right after the concert. There are also buses leaving regularly from Boston--or better yet, a scenic two-hour ride on your own four wheels.

The Harvard Summer Chamber Players, who have consistently received rave reviews in the Boston papers this summer, will present the fourth of their weekly concerts Monday night in Sanders at 8:30. Tickets are available at the door or in advance at Holyoke Center Box Office.