There are a few options, try Al Gosaibi Stables, and on the way to Industrial Jubail there are many stables and places to ride.
A school or riding school
It depends on the riding school.
There is a horse called Hugo because at my old horse riding school there was a horse called Hugo. Unfortunatley i have forgotten the name of my old riding school because it has been such a long time.
the BHS (British horse society.)
Nisha Uniforms at Dammam - near post office.
The rider who does not have right of way do in an indoor or outdoor riding school should go into the inside track.
No but there are some schools that you can leave school early to go to a horse club that is sponsored by the school.
Andalusian and Lusitanos.
Left shoulder to left shoulder when passing on horse back.
It depends on the school. Some schools yes, you must have your own horse. Other schools will lease a horse to you or have lesson horses that are used.
A place to ride your horse often with a sand floor. Also knowed as a school
No you do not, you could lease or even borrow a horse