I've got the very rare percussion call tonight, but there's a chance I might be doing this coffee house gig on a semi-regular basis. He's singer/songwriter ... hard to describe his style. Sort of a Latino folk/balladeer with an American twist. He doesn't want a cocktail kit (too American for him, I suppose), so I've cobbled together two conga drums, bongos, three sizes of shakers, a Zildjian hand cymbal, a splash cymbal, etc. If I do this often, I'll probably look for something to play with my feet. Maybe something for clave, although it's not all Cuban stuff.

Besides the fact I'm an idiot savant percussionist (I've always been able to pick up stuff and do one thing with my right hand and another with my left), I know, like, two conga patterns. Everything else I play is ... well, they end up like the patterns I play on the toms on drum set. Not very hip. I've called the two best congeros I know in the area, and both of them are over-booked with lessons/gigs through the summer.

If anyone knows where I might find some cool patterns to get me by and not make look like such a gringo, I'd appreciate it!

I've read about 10 books on Latin and Afro-cuban drumming, as well as having watched about that many DVDs and also that many instructional CDs. For what it is worth, my favorites are:

1. Ed Uribe's "The Essence of Afro-Cuban Percussion and Drum Set: Includes the Rhythm Section Parts for Bass, Piano, Guitar Horns & Strings (Paperback)"  (Book & 2 CDs)

2. Alan Dworsky's "Mel Bay Conga Drumming: A Beginner's Guide to Playing With Time (Paperback)" (Book & 1CD)

3. Kim Atkinson's CD's on specific rhythms:
http://www.pulsewave.com/catalog/i_catalog.html

hehehe ... that's more or less what I'm doing right now. Just the shifting the patterns a quarter note when things get stale.

All good suggestions.  Another thing I do when I get a latin-drums-on-a-non-or-semi-latin gig, and its just me with no drummer, is bring a hi-hat.  Your left foot knows how to tap a back beat, so let it.  It just makes simple two or three man accoustic gigs feel a little more comfortable for the musicians and the listeners.  They get something familiar to latch on to.  I usually bring a clave pedal as well, but I usually only play it on select songs with a strong beat and feel. 

i will second what straps said, which is almost exactly what i do on most of my gigs. though i live in miami, i usually never get to play with latin players, only white guys with guitars. so i use a hihat on the left and a clave pedal on the right, with either a block or a cowbell attached. i use a quinto and a conga, bongos and a hand splash cymbal. you can make a pretty full sound with all that without a drummer. i also sometimes play the congas with rute sticks, which ends up sounding like im playing traps drums almost, especially when adding patterns on the splash cymbal and the hihat. this is how you can find some non latin patterns very easily. many dont realize you can play congas with sticks.