I waitress full time because I make alot of money and really want to invest in real estate properties to rent out.

Both work menial jobs, gas station and waitress, but together their income estimates are good enough.

My college-aged children lived there in the summer when they worked as waiters and waitresses at the local restaurants.

Talk to the owner, talk to the neighbors out working on their yards, talk to the waitress at the local diner. 

My friend recently graduated from Montclair State U with a bachelors degree, no prior experience (worked as a waitress) and is starting at $38 an hour in the Oncology department.

Tenant did a runner.My second example is a current tenant, young waitress with a child, my wife took pity.

Is their job a safe job or one with high turnover (e.g. waitress vs mortgage lender)4.

Prior to the position I'm in now, I waitressed (tips) and was also 1099. 

There is a shortage of affordable housing in the city so if a person is a waiter or waitress or within the service industry then its hard for them to find a place to live on their own without room mates.

Hand everyone a card, leave them on bulletin boards, give them to your waitress, or whatever.Where to hang your license?