I play in TSVL and SandSharks. There is a Thursday night rec drop-in at Ashbridges but it's not posted anywhere - it's more word of mouth because there isn't a lot of equipment to handle a larger turnout. They play on the West side of the Bay along the tree lines (courts 96 and higher I believe) and the pubic courts on the same side of the Bay closest to the showers/bathrooms.
Because of the turnout on Thursdays, we've started playing 2s as well but Saturday/Sunday are the main dates.
If you're looking to develop skills and play 2s, SandSharks will be your best option. http://www.sandsharks.org/