A specialist in film comedy, Tisch has also produced the occasional dramatic feature. Maximizing the advantages of his family connections--his father Preston Tisch is president and co-chief executive of Loew's Corp. and his uncle Laurence Tisch is chairman and CEO of the board for CBS, Inc.--Tisch began his career early, working during college breaks for producers John Avildsen and Fred Weintraub. Upon graduation Peter Guber, then head of production at Columbia, signed him on as an executive assistant. Tisch produced his first feature "Outlaw Blues" (1977) at age 28 and has gone on to carve