In a new sign of strain on California's overcrowded prison system, inmates at 14 lockups are being housed in some of the last spaces available to corrections officials — the "dayrooms," or communal spaces where prisoners watch TV, mingle and play cards. The emergency move — outlined in a state Department of Corrections memo obtained this week by The Times — is being enacted as new inmates, primarily from Los Angeles County, continue to flood the prison system despite predictions from corrections officials that the convict population would decrease this summer. For years, state prison officials have found creative ways...