This might be a dumb question but...
When you've accepted a summer offer, do you keep in touch with contacts at other firms that you did not interview at? Over the last year, I've met various people at different banks but I never went through a serious interview process with their firms (I met them through info sessions or preliminary interviews for special programs like shadow days). It's not like they're my close mentors but they probably know my name and remember conversations I've had with them.
Should I let them know what I'm doing instead and catch up with them somehow? Would it be helpful in case I have to go through full time recruiting or does it just seem obnoxious?