If you like to visit the markets there are loads of them all over the island.  Below are a selection of popular ones in the South of the island.

Los Gigantes - Plaze del Llano Mondays 10am - 2pm

Golf Del Sur - Fridays 10am - 2pm

San Isidro - Friday nights 5pm - 9pm

Los Cristianos (next to Arona Gran Hotel) - Tuesdays (NEW!!!) and Sundays 9am-2pm

NB Sunday 25 April 2015, moved from temporary location back to Arona Gran area and extra Tuesday market to start from 27 April at the same location.

El Medano - Saturdays 9am - 2pm

Torviscas (Costa Adeje)Thursdays & Saturdays 9am - 2pm (opposite CC El Duque, Fanabe) - A very large market 

Los Abrigos - Tuesday nights 6pm - 10pm (very small (10 stalls)-the bags for sale came from 'Made In China' boxes

Playa San Juan Wednesdays 10am - 2pm

There are also the Farmers Markets where you can buy all your fresh fruit and veg (nothing pre-packaged here choose what you want, dirt and all) can't beat really fresh food.   Saturday, Sunday 9am - 1pm and Wednesday afternoons in Las Chafiras near the Fire Station and Saturday and Sunday mornings in San Isidro