Want to have fun, learn something new, get some exercise, meet cool people and raise money for a good cause? If so, there are three great events to attend this weekend, starting tonight. (Is it wishful thinking to consider Thursday night the weekend?)

Tonight, the Chris4Life Colon Cancer Foundation is partnering with the Colon Cancer Alliance, Harry’s Tap Room and socialite/blogger Pamela Sorensen to throw a happy hour fundraiser, part of the DC Goes Blue Week for Colon Cancer. It’s taking place from 5:00 to 8:30 p.m. at Harry’s Tap Room (2800 Clarendon Blvd). The happy hour will include a silent auction, raffle prizes, a signature “Blue Life” cocktail specially created for DC Goes Blue week, as well as special guest celebrities. A portion of all sales from the event will go to benefit Chris4Life and the Colon Cancer Alliance.

On Saturday, the Friends of the David M. Brown Planetarium will hold another “Night at the Planetarium” fundraiser, consisting of shows and outdoor stargazing. See more details from our post earlier this week.

Finally on Sunday, the Cancer Prevention and Treatment Fund will hold a 5K run/walk at Bluemont Park (601 North Manchester Street). All fees collected for this event will go to help prevent and treat cancer. All participants receive a race T-shirt, and children under 13 will also receive a blue ribbon. See more information here.

There’s a lot more going on this weekend. Check out our events calendar for more.