Girlfriends Films is announcing the video-on-demand (VOD) release of a new entry to their cheerleader-themed series entitled Cheer Squad Sleepovers 37. The film, featuring approximately 3.5 hours of hardcore girl/girl footage and showcasing contract star Aubree Valentine in three of its four all-girl scenes, is now available exclusively at the Girlfriends Films VOD website.   This new installment to the…