D.C singer-songwriter Sean McArdle came by about a week ago to play a couple of songs at our offices. That’s him on the left. (On the right is Will Morton, who built the steel guitar you’ll see McArdle playing in the first video.) McArdle, a former CP staffer, has a new single out, “Still Working,” and another song of his, “I Go Shopping,” appears on Keep Singing!, a compliation on College Park’s Exotic Fever Records that benefits the local pro-vegan/vegetarian nonprofit Compassion Over Killing. He plays the Velvet Lounge tomorrow, Saturday, Feb. 23.