That's for after finals. Get the group together at a set time. It may be tempting, but don't bring beer. Beer may be conducive to opening your mind, but it makes it difficult to cram stuff in. It will kill studying.
People tend to resort to conversation and horseplay after five to six minutes of intense studying.
It will sober you up quickly and put you back on the subject of graduating college. And don't give up early. Twenty minutes is not enough studying, no matter what you tell yourself about the ease of multiple-choice. Cram at home. After your study session, do some cramming on your own.