Er, I have to count it in my head... I think four over three different games. One was back on Call of Duty 4. We were a clan that played tons of a mod called Promod. It was pretty common to play so-called ''wars'' on random servers. You even had cups and rankings on ESL website.
Another clan was on MW2. This was more of a friends type of clan. It was around 15 of us, all friends and we played MW2 together, scrimmed other clans and things like that. I loved those days the most!
Then I had two different clans in World of Warcraft. One clan was back in the vanilla days. It was my first serious clan and it was raid oriented. It took ages to even get inside because they were so strict. We did all of the 40 men raids but after a while, I just got burnt out and I took a break from WoW. During that time I quit the clan and when I returned I switched to playing Horde. Now, I am currently in a small social clan, we don't raid or anything. Just do mythics+ and socialize.