As you'll learn from today's DJ Q&A, Kool Karlo & Haightin' Clayton are quite fond of skate mags, plastic watering cans, and making Tuesdays into the new Fridays. (But they can also keep Fridays as the new Fridays, if you check Clayton out tonight.)The pair pull San Franciscans out of those tall booths and on to the dance floor at the Ambassador, drowning out polite conversation with "butt-tickling bass" of the rap and electro varieties. They may not make enough bank to realize