Campaigners praise the prosecution as a 'historic moment' for the practice, which is widespread despite being outlawed in 2008.
Meanwhile tensions surged ahead of the anniversary, with the killings of two female demonstrators.
King Abdullah's death has brought long-standing worries about the repercussions of a succession crisis in the turbulent region to a head.
Mohamed Soltan, detained by Egyptian authorities for attending a protest in support of ousted president Mohamed Morsi, has been on hunger strike for almost a year.
Every man has his 'ahwa,' a place where he goes to catch up on neighborhood gossip, smoke shisha and talk with friends — and a place where women are not welcome.
Rights groups say some of the children have been held for months without charge, and without their parents being allowed to visit.
The 26 men were arrested in a raid on a bathhouse in Cairo that was broadcast on television.
Mass arrests at a bathhouse in Cairo are the latest sign that Egypt's persecution of LGBT people is getting worse.