ok lemme xplain.....

they r friends and partying and men and women mingling...
there is a diffrence between gathering and partying.

if its a gathering no one would interupt them.

if a women in in hijab and those ppl are having just dinner and all tht then islam dont prevent them

but if u take it to party then there is vulgarity which islam strictly prohibit.
if women are not in hijab it will provoke the men and will lead to illegitimate acts....

secondly its the matter of mehram and non-mehram in islam.. if u knw tht... so if non-mehram gathers and women are in hijab then its ok. but in party do you think these things are possible??

not in islam but in all the customs the guidence is quite the same. but muslims follow them and i dnt knw y others dnt.. bcz thy believe in freedom? wht kind of freedom u need??

u want a girl to go out partying get drunk and do some thing illegitimate and then regret it.. is this ur definition of freedom?? ur religion allow the act which leads to such incident?

think out of box and FOLLOW THE RULE.... dnt stick to WHY WHY WHY WHY am i not allowed... if u r not allowed , U R NOT.

try to think