Medano beach is left , the Cabo Marina is center and Solmar beach is outside far right of this view of the Cabo San Lucas Bay picture. I recommend doing this at least once while you are in Los Cabos. Don't forget your camera, but put it in a water proof bag for protection. If you were looking for all the people, this is where you will find them. It is a long stretch of beach that has many hotels, restaurants and drinking holes, but a great place to be if you are a people watcher or exhibitionist.
Swimming here is safe but watch out for the jet-skiers.
A great beach for taking off your shoes and stroll the beach. Be sure you leave nothing of value in your car as this is a very busy area and there are lots of people coming and going. I believe the finest cove in this area, but there are no facilities, so take whatever you need for the day or evening with you. Same warning on the car. As in most of these area's you can not watch your car from the beach.