When I was walking by the Botanical Garden I noticed about many small stands made of straws and also many tables and plastic chairs placed in the gardens.My visit to the city was the first week of April and I didn't know about that but on that time is one of most important festivals in the city.
Is named as "Feria de Primavera" and there is also a very nice and big parade on the oldtown and something called "La Guerra de las Flores"(Flower's Battle) that was held in the old town at 7 p.m so I didn't had the time to see it but it sounds very nice isn't??
It seems that during the time of this festival (about one week) all assistants to the parade and rest of events come here to the Botanical Gardens to have the lunch on these strow stands.
In many places of Spain there are a sort of group of friends that are in a kind brotherhood called "Peñas" it seems that here in Murcia,all these people are orchard's keepers that have some land outside the city,and for what I saw they have lots of FUN doing that!!.