Saturday, 15 September 1990
Spectrum Theater
Philadelphia, PA, USA
supporting Billy Idol
Setlist albums:
The Real Thing cover The Real Thing 7
Other cover Other 1
Angel Dust cover Angel Dust 1
Introduce Yourself cover Introduce Yourself 1
From Out Of Nowhere
Falling To Pieces
The Real Thing
outro Public Enemy, "911 Is A Joke"
Underwater Love
Edge Of The World
We Care A Lot
middle New Kids On The Block, "The Right Stuff"
Sweet Dreams (Nestles)
Surprise! You're Dead!
Epic

Easy (Commodores)
Confirmation:
It's assumed that the video bootleg labelled Spectrum Theater on 17th is actually this date and as such setlist details have been copied from there.

Setlist.fm
Morning Call (George Smith) 14 Sep 1990: "Faith No More -- which opens for Billy Idol at the Spectrum in Philadelphia tomorrow [...] So far, Faith No More has only done two dates opening for Billy Idol."

"Morning Call" Allentown, PA, 22 Sep 1990 (Cheryl Wenner) - "The headliner's share of last weekend's sold-out concert at the Spectrum was, sad to say, undermined by theatrics and cartoonish posturing, but San Francisco's Faith No More, whose second album "The Real Thing" is already a best-seller, no doubt won new fans with its 45 minute set."

Philadelphia Inquirer, 20 July 1990, page 29, Spectrum ad
Description:
Before Easy the band tells everyone to "sit the fuck down"
On This Day:
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1989 Shoreline, Mountain View CA, USA
1991 Estádio Mané Garrincha, Brasilia DF, Brazil
1992 H. Humphrey Metrodome, Minneapolis MN, USA
1995 Karma Concert, Concord Pavilion, Concord CA, USA
2015 Viva Park, Alajuela Costa Rica