What is the ruling on watching a man who imitates women in appearance and behavior at a party?

If one is invited to a banquet where there is an abomination (munkar), it is not permissible for him to attend. If he did not know about the abomination and attended, it becomes obligatory for him to leave the banquet upon seeing the abomination, unless he is able to denounce and change it. This is supported by the Hadith of the Prophet (peace be upon him) returning from the house of Ali (may Allah be pleased with him) when he saw the curtain (qiram), and his saying: "It is not fitting for a prophet to enter a house adorned with pictures." Thus, the presence of an abomination in a house prevents entry into it, and imitating women is among the forbidden acts.