Personally, i dont see any clashes. First, there are many different events, people do pub crawls, how about a Fundraiser crawl! All the events will be raising money through bar sales, food sales and other events, not to mention GREAT times with friends and FUN stuff for kids.
Besides, everyones heart strings are pulled by different causes and charities. Who's to judge?
Not only do i see it as "not a clash" and most definitely not the negative implication of being the "nature of the beast". I see it more as how people go shopping in an area where there are lots of antique shops...you make a day of it, go "antiquing" for the day.
So, this Sunday, you can say to yourself, your dog, your kids, your friends, your spouse or partner:
Let's go "Fundraising" for the day!
Let's go "Socializing" for the day!
Let's go "Do Fun Things With The Kids" for the day!
most importantly, let's not chose to see all this amazing outpouring of social conscience as a competition. Let's go "Look on the Positive Side" for the day instead