Airheads (1994)

Three would be rockers Chazz, Rex and Pip, known as The Lone Rangers plan to play their demo on a recording company, but then they're turned down rudely. Then they decide to try the famous rock n' roll radio station, but are not accepted either. Then they decide arm themselves with squirt guns and take the station hostage for not playing their demo. But the three get more than what they have bargained for.