She goes to restaurants or playgrounds with her female friends
Question

                Is it permissible for a woman to go with her female friends to restaurants and the like, or to go bowling and so on, with the permission of her husband but without him being there?.
Praise be to Allah.
      The confirmed basic principle with regard to the Muslim 
      woman is that she should stay in her house and keep away from places and 
      situations that involve mixing with non-mahram men; she should also strive 
      to cover herself completely and protect herself from immodest behaviour 
      with others. All of that and more is part of the etiquette of hijab, 
      clothing, modesty and chastity, seeking to purify hearts and keep them 
      free of immorality and corruption. Allah, may He be exalted, says:

    “And stay in your houses, and do not display yourselves 
    like that of the times of ignorance, And perform 
    As‑Salaah(Iqâmat‑as-Salaah), and give Zakaat and obey Allaah and His 
    Messenger. Allaah wishes only to remove Ar‑Rijs (evil deeds and sins) from 
    you, O members of the family (of the Prophet 
    صلى الله عليه وسلم), and to purify you with a thorough purification”

    [al-Ahzaab 33:33]. 

    Shaykh al-Islam Ibn Taymiyah (may Allah have mercy on him) 
    said: 

    When the Muhaajiroon came to Madeenah, the single men used to 
    stay in a house that was well known and was separate from the houses of 
    those who had families, so a single should not stay among those who have 
    families. All of that is because if one of the two types mixes with the 
    other, it will lead to fitnah (temptation). If mixing men with women is 
    mixing fire with wood. Al-Istiqaamah (1/361). 

    Al-Imam Ibn al-Qayyim (may Allah have mercy on him) said: 

    There is no doubt that making it possible for women to mix 
    with men is the sources of all corruption and evil, and it is one of the 
    greatest causes of punishments coming upon the entire community. It is also 
    one of the causes of corruption in public and private affairs. Mixing of men 
    with women is the cause of a great deal of immoral conduct and zina. 

    Al-Turuq al-Hukmiyyah, 407. 

    Once this is clear, it is not permissible for women to go to 
    places where they mix with men, whether it is a playground, a club, 
    restaurant or a house, even if that is with the permission of the husband. 
    What the husband should do is prevent her from going to places in which it 
    is possible for her to mix with non-mahram men. 

    But if these places are only for women, or there are hours 
    which are only for women, in which no men take part, and men cannot look at 
    the women or contact them, and fitnah is not possible, then it is 
    permissible for a woman to go to these places with other women, if her 
    husband gives her permission for that. But we think that this assumption is 
    not realistic; rather such places are not available in the greater part of 
    the Muslim world so how about in the West? 

    And Allah knows best.