Her father is forcing her to attend gatherings in which there are innovations (bid’ah). How should she behave with him?
Question

                My father is forcing me (19), my brother (15) and my sister (11) to go to a place where bidah is practised and if i dont go my dad will find out. at that place they sometimes miss prayers, they sing, they recite the 99names of Allaah together in groups rocking back and forth(i never knew the companions to do this?!), and add extras at the end of surah-tul fatihah. Im a new muslim and i dont want to go astray like some people have, i want to go strictly according to the sunnnah of our prophet (pbuh). However, if i dont go, i fear i would get kicked our of my house for disobeying my father, i would have no where to go, but i was also told the hadith of where innovation is present we should leave. i dont know what to do, i would rather tell my dad that im not going and get thrown out cos i fear Allaah, but it would be cutting ties of kinship which is a great sin!....if i go, what about my brother and my sister, how would i rescue them from this innovation, and where would i go to? am i allowed to leave my house and live with another sister or do i need a mehram? please help me.
Praise be to Allah.Firstly: 
When reading this letter, 
    although we feel sad about what is mentioned in it, we feel happy when we 
    read of this sister’s common sense, intelligence and good following of the 
    Sunnah, and that she is upset at the presence of bid’ah and she is afraid of 
    falling into sin by disobeying her father who is telling her to go to the 
    place where these innovations are practised. She is also thinking of leaving 
    home but she is worried about her brother and sister and is afraid that she 
    will be going against sharee’ah if she does not have a mahram with her. All 
    of this, and she is a new Muslim. We ask Allaah by His names and attributes 
    to make her and her siblings steadfast in adhering to the truth, and guide 
    her family to follow the Sunnah. 
Secondly: 
We say to the sister who is 
    asking this question: 

    1.Undoubtedly attending these 
    gatherings with their innovations and sins is regarded as something that is 
    contrary to sharee’ah. Those innovators are not content with merely 
    mentioning the names of Allaah in song and dance, rather they had added 
    other sins, namely failing to offer the prayers on time. This indicates that 
    their claim that they are worshipping Allaah and drawing close to Him is 
    false. If they were sincere in their desire to draw close to Him, they would 
    worship in the ways that He has prescribed, and they would not miss the 
    prayer, which is the greatest practical pillar of Islam. The texts of the 
    Qur’aan and Sunnah issue stern warnings to those who do not offer the prayer 
    on time and those who neglect the prayer.

    2.It is well known in sharee’ah 
    that attending such gatherings incurs a great deal of sin and leads to many 
    negative consequences, but there may be some interest to be served by 
    delaying one’s refusal to go, because that delay may bring benefits and ward 
    off harms.

    3.One of the interests served by 
    your continuing to go now is taking care of your brother and sister and 
    making sure that there is someone with them who can guide them and explain 
    to them what is wrong with these actions. Another interest that will be 
    served is making sure that your non-attendance will not lead to your father 
    throwing you out of the house, which is something that would lead to many 
    evils and bad consequences, the extent of which no one knows but Allaah, 
    especially in the country where you live and even in other countries. 
    

    4.We think that you could 
    continue to go, but go as little as you can, and make up some excuses that 
    will be acceptable to your father for not going, as well as trying hard to 
    bring in wise people of Ahl al-Sunnah who can explain the truth to your 
    father.

    5.A person such as you will not 
    be deceived, in sha Allaah, by what these ignorant innovators are doing. 
    Neverthless we advise you to protect your faith by doing acts of worship and 
    increasing your knowledge by reading and studying the books of Ahl 
    al-Sunnah. This will be beneficial for you. And ask trustworthy people of 
    Ahl al-Sunnah about everything that is not clear to you, and remember that 
    you have to keep advising and teaching and guiding your siblings. You should 
    also try to influence some of the other girls who attend these gatherings 
    and call them to the truth and the right path.

    6.If you go there, we advise you 
    to avoid these gatherings as much as you can, by sitting with the women in a 
    separate room far away from these innovations and deviations. Be the last to 
    enter and the first to leave, as much as you can.

    7.We advise you to sit with your 
    father and discuss with him what he is telling you to do, and to try to 
    convince him about these innovators. You are at an age where you can do that 
    with him. And you have enough knowledge to convince him in sha Allaah.

    8.Always pray for your father and 
    advise him, and treat him well all the time, for “there is no kindness in a 
    thing but it adorns it, and it is not taken away from a thing but it makes 
    it defective” as the Prophet  (peace and blessings of Allaah be upon 
    him) said.
We ask Allaah to help you 
    to do that which He loves and which pleases Him, and to make you steadfast 
    in adhering to the truth, and to guide your father to the truth. 
And Allaah is the Source of 
    strength.