听力原文:There will be only two more California shows before the band heads off to Holland for their theater tour. On Monday, October 12, the four Lennons will perform. two intimate, acoustic sets at 8 and 9: 30 p. m. at Typhoon Restaurant and Bar at the Santa Monica Airport. The venue is small and admission is free, so you know it's going to fill up quickly. Therefore, I strongly recommend that you get there early and grab dinner, or risk being turned away at the door. What is the main function of this announcement?