click to enlarge Brad Loudenback's Amsterdam, now at Hoffman LaChance.

click to enlarge Gena Brady's work is on display at Subterranean Books beginning this Friday.

If you're interested in seeing some art this weekend, we've got some options for you. Brad Loudenback has a new show at Hoffman LaChance, while Subterranean kicks off a St. Louis-focused exhibition — and offers a one-night-only discount to boot.Here are our picks for art lovers this weekend.Collage: Remnants of EuropeHoffman LaChance Contemporary2713 Sutton Blvd., Maplewood, www.hoffmanlachancefineart.comOpens 6-9 p.m. Fri., Apr. 8. Continues through Apr. 30.Cities are mutable organisms, but that’s only through the actions of humanity. They change shape, expand and contract dimensions, and fall apart and coalesce over the course of their existence. While Brad Loudenback was working in Europe, he realized the connection between the lifespan of a city and the art of collage: Old layers are covered by new layers, but not entirely obliterated. His work on display here further explores this concept. Loudenback’s collages are portraits of European metropoles; each is built from images of the past, both good and bad.Subterranean Books6275 Delmar Blvd., University City, www.subbooks.comOpens 6:30-8:30 p.m. Fri., Apr. 8.St. Louis is the subject of this dual exhibition by local photographers Gena Brady and John C. Seuc-Rocher. Both are intrigued by the parts of the city you see but don’t really notice, whether that’s the pure geometry of parallel lines that a crash barrier makes when properly framed, or the little bits of life that are found even in abandoned parts of the city: flowering weeds, bouquets left behind on a wall, or the familiar sight of arms braced on the window frame of a passing car. Take note: During the opening reception, Subterranean will knock ten percent off the price of photography books.