Find male companions by travelling independently to Mediterrane

I am a retired 66 year old Chinese single man living in San Francisco area.  I am looking for male companions by travelling to Mediterranean area around 10 to 20 days.  I would like to organize a tourist group with the ideal number of four.  I have been to western Europe twice,  including two countries, France and Italy which are next to Mediterranean.  So I am familiar and have experience with Mediterranean. I can drive and walk 2 miles everyday, and am ready to confront this challenge.