Summer Nights in Silverlake held a concert as a benefit for the Silverlake Dog Park. Beck was about to head off on Lollapalooza for the rest of the summer, but as an integral part of the Silverlake music scene, he performed solo acoustic.
Unsure of the exact date; a banner in the photo says "Summer Nights In Silverlake" on one line and then "June 9 September 17" on the next. If those are the two possible dates, Beck could have played either (they would be just before and just after Lollapalooza and his Europe tour). I'm going to list this as June 9 for now. (There's almost no other info about this little show on the web. Jane Wiedlin from the GoGo's also performed.)