Pam Shriver's 24th annual Charity Tennis Challenge that benefits children's charities will begin its fundraising festivities tonight at the Let it Rip Reception & Auction at the Tremont Grand hotel at 6:30 p.m. The evening is to be highlighted by a live performance by the Bryan Bros. Band, featuring the World No. 1 doubles team of Mike and Bob Bryan. The dress is business casual, and tickets are available to the general public. For information, call the event's ticket office at 410-296-2929. Tickets are also available for Wednesday night's Tennis Challenge, which will feature former World No. 1's John McEnroe and Lindsay Davenport, rising stars John Isner and Melanie Oudin, as well as Orioles pitchers Jeremy Guthrie and Brad Bergesen and the Bryans.