Gendy Alimurung and Nathan Ihara

Besides hiking and biking the L.A. River, and maybe spotting some birds, you might want to get involved in its future. Clean it. Green it. Send your George W. tax cut to the folks who are fighting for it. Here’s the who, what, where: Arroyo Seco Collaborative, www.lariver.oxy.edu, (323) 259-2991......

Heat got you listless? Well, here’s a list — a list so cold it gives Björk the shivers. It’ll give you brain freeze faster than a Mountain Dew Slurpee, and is colder than Dentyne Ice. It’ll be the chill room for summer’s Club Meltdown. Let your brain and blood run......