For a number of Sacramento's magazines, the phrase "labor of love" takes on a double meaning. Three of the best-known local magazine publications are run by talented couples. Sactown Magazine is run by husband-and-wife team Rob Turner and Elyssa Lee, and Midtown Monthly is run by married couple Tim Foster and Liv Moe. Sacramento's newest couple-run magazine, Submerge, is run by Jonathan Carabba, 24 and Melissa Welliver, 29, who are unmarried. This Saturday, their biweekly will be celebrating its two-year, 50th issue anniversary with a party at Marilyn's on K. It will feature live music from hip-hop artist TAIS, dub artist CHLLNGR (formerly Dub Defender) and DJ Mike Diamond. "I think (wo