The questioner wants religious 
guidance about gender mixing. 
People of the same gender meet easily but can the opposite 
gender people meet with as much ease in friendship? 
There are some rules and etiquettes 
which God has set for all mankind.
Our religion stresses that sexual relations should 
only take place between husband and wife only.
It is a very special command of our religion. It is because 
without it, the institution of family cannot be built.
To be a part of this scheme of God, 
that involves bringing up children,
giving them a family and relations of parents, 
and a sacred and protected environment,
for which we make sacrifices by restricting 
the sexual urges to only husband and wife.
For this purpose, some rules and principles have 
been set in order to prevent any issue within the society. 
The principles require that while women meet men 
or men meet women, both should lower their gazes.
Lowering the gaze means keeping their looks pure of all
evil thoughts. They should not stare at the other person.
Lowering the gaze does not mean looking down straight 
and consequently bump into something and fall down.
In Arabic, it means that the gaze 
should be pure of all evil intentions.
Another requirement is that we should 
protect our private parts, i.e. genitals.
While dressing oneself, one
should choose a decent dress.
One should exhibit a modesty and decency in one’s dress
and attitude. This demand is from men as well as women.
The only additional command for women is that 
in normal routine, they can meet each other,
go to offices, or do any work they want but if they are 
wearing unusual dress applying makeup and wearing jewelry,
then they should keep the whole body 
covered except their face, hand and feet.
