I have an iPhone and a personal gmail acct/calendar.  I am participating in something that me and others need to add entries to a calendar.  I do not want the crap that's on my personal calendar shown to them.   
What I did was create a gmail acct named EpicCalendar@gmail.com, I will give each person the password to that acct and have them add it to their phone.  I added just the calendar, no mail, to my iPhone and some test entries.  They are showing up.  Now I need to test on a Android.