Im always looking for a restaurant bar that has good calamari. Right now my favorite is Mirabelle on Sunset. The breading is not too thick and the meat is always nice and tender. They give big chunks rather than the dinky little over fried ones at most places. The only thing is its $13 which is a lot for just calamari.
Other places Ive tried that were just o-k was Bungalow Club and The Belmont. Belmonts is not that great but if you go for happy hour I believe its $5.