13th Birthday Help!!

Hey, Ok I haveing a boy -girl 13th birthday party with my best friend and we both don`t know what to do!! wel we are renting out the ymca so it is just our friendsthat come and then it starts at 6 and then guys go home at 10:30 and the girls sleepover at the ymca but we cant play gmaes like spin the bottle becaz my parents are watching and they wont like that and we are inviting like 40 people!! please help and hurry ( oh yeash it is in feburary) no outside things