We currently have 2-5 peppermint shrimp (depending on how many you count at one given time!), a skunk cleaner shrimp, a fire shrimp, and a reef lobster in a 90 and have had no problems. The shrimp have to think twice about going for food near the lobster's cave, but I've never seen any issues between the shrimp themselves.
Coral banded shrimp are best kept alone unless in a very large tank where there is room for being territorial. I have not tempted keeping them with other types of shrimp, but I've heard they can cause a massacre of other shrimp... I wouldn't risk it.