Complex sentence: Once they run out of money, they use their guns to rob a video arcade, and spend their stolen funds at a strip club, where the angry gangsters find them and threaten to kill them if they don't return the weapons within a day.
Split into simpler sentences: Once they run out of money, they use their guns to rob a video arcade, and spend their stolen funds at a strip club. The gangsters, angered, find them and threaten to kill them if they don't return the weapons within a day.