Does paying $20 to enter a South Beach club where you have the privilege of plunking down $9 per drink leave your bank account a bit barren? Don't worry -- if it's a low-dough night you're looking for, then stumble no further than Loco Thursday at Iguana Cantina. Be forewarned that scores of college drinkers and cheap alcohol go hand in hand, but when the cover charge is a hefty $1, and 50-cent margaritas and draft beers are available until 5:00 a.m., chances are eventually you won't care who you're drinking with.