However, 2 recent university grads (both female) want to rent it together.

Be a victim . . . or keep fighting and end the slave trade.Born a female in 1867 when only men can allegedly have a business and get ahead? 

A couple where the female works in a bar. 

Most of my married couples or female investors want to lay low.

The 2nd case was a female tenant who requested permission to change her locks because she was afraid of her boyfriend.

I'd splurge & buy a female golden doodle. 5. 

I have a few potential tenants, but the ones that are most interested are a male and female couple.

If my first tenant is a female and she doesn’t feel comfortable with having other male house mates, am I allowed to rent and advertise to just females only?

Many would call that a bad deal; however, you have to look at a) the money I saved on living expenses over those 3 years, b) the equity I've gained through appreciation and pay down on a loan that I've never once had to pay with "my own" money, c) the education I've received because I had the bright idea to rent out some spare bedrooms in my house after college; I wouldn't be here on BP with 2 more properties if I hadn't bought that house, and c) the confidence I gained from becoming a female homeowner and landlord at the age of 25.On paper, that house looks like a bad deal; however, I see it as a savings account for another property that also happens to pay me $65 a month.

If you're not married, bring your sister, bring your female friend, hire a damned homeless off the street as a chaperone next time.Go call a local lawyer and tell her (VERY PREFERABLY A HER) your sob story.