Friday:Nectar is hosting a Patron Appreciation Night this evening. Two great DJs– Leopold Bloom and DJ Million– will be spinning for free at 8 p.m., and best of all, there will be all-night drink specials. Righteous!Saturday:Doug Martsch, lead singer of Built to Spill (and the person depicted in that badass caricature), will put on his DJ cap and spin at Solo tomorrow night starting at 9 p.m. That is absolutely free, too.In a completely different vein, Bop Street Records is holding a hootenanny tonight. Roots music fans should check it out. It’s free and all ages, too.The Girls play a show at the Holy Mountain on Saturday…but unfortunately, I cannot give you more details than that lest the Bureaucracy of Fun Spoilers catch on to this awesome venue. Well-loved local punk band Thee Emergency plays a free, all ages show at Full Tilt Ice Cream in White Center tomorrow; that starts at 8 p.m.