This city has seen sushi bars, ceviche bars, tapas bars, topless bars, wine bars, piano bars, and noodle bars ... and now it has a hummus bar, which is what Nanoosh on the Upper West Side is billing itself as. I stopped in yesterday to sample a few of their nine varieties, and was impressed by the creaminess of the hummus with fava bean stew, and the spiced ground meat that topped the "hummus beef." Also on the menu: soups, Mediterranean salads and wraps. Word about the spreads will soon be spreading, as plans for Tribeca and the East Side openings are afoot.