There are plenty of Male Salons around; just ask when you arrive.
Best gym would be Z Club, yet that is about 10,000 a year. Also Gold Gym which is round 2.500Rial per year.
Students: If you have excellent classroom management you will be fine. It is a matter of engaging and hooking your students into learning. Like anywhere in the world.
You will have opportunites to meet many peole from your country and could mix behind closed doors, for example having a dinner or maybe going to one of the beaches north of Jeddah.
A really good salary for teaching is 19,000+Rial per month.
A middle of the road salary is round 11.500+ per month.
For non- native speakers from 7,500 per month. Lower than that is 6000 per month.
Like anywhere there is male rape, yet less here, yet it does occur. If the culprit is caught usually it is the death penalty or long term jail sentence with up to 1,000 lashes over the course of their sentence.In saying this, it is a deterrant for potential rapists.
The Religous Police here are probably the most tolerant of all in Saudi. Infact, they are excellant and generally leave the expats alone. It is because of this, they are respected more here than any other place in Saudi.
You will find it common to go out, where many locals don't wear the berka and some don't wear the hijab. Others have their abayas open. I have seen this everyday in the neighbourhood where I live. It is not only refreshing, it gives a sense of normality and one can see a real shift in the repressive dresscode. As for men, many in my neighbourhood wear long shorts,tee shirts etc which I have never seen any in other place in Saudi. I don't know if it is another set of rules for the super rich yet for many their dresscode remains Western. In any other place in Saudi Arabia they usually wear traditional clothes.
Unfortunately, if you are white, you are at the top of the peaking order; no such thing as equality. There are many Phillipinos, Indians, Pakistanis and Bangalodeshes in Saudi Arabia; millions in fact. Because of the large number of workers, you can find food from your country, sold in super markets.
Will you like it? It all depends of your personality too. Many do not like it here, where others love it. As a male you have an advantage in that you can drive a car or ride a bike. It makes all the differance if you own transport.
Jeddah is the most relaxed city to live in and a great experiance. You will find the Saudis friendly, however each person's point of view is different.
Come with an open mind, enjoy the beaches and breath-taking scuba diving. You will probably have a fantastic time. Good luck.