Are these insturments enough for a small jazz band?

[tenor and soprano]

I play tenor, my friend soprano, my other firend alto. My friend's bother plays piano/keyboard, and his friend plays drums. Do you think that this is enough for a jazz band? Is it too many saxes? Do we NEED a base?

[Gandalfe]

Even though you'd probably want bass and drums in a xTet (where x equals 4 or more players) it sounds like you have the basis of a nice jam session. Trading riffs and vocabulary is an excellent way to develop some jazz chops.

[CMelodyMan]

You may want to consider adding a trombone and a trumpet or two to your group, or you could take the saxophone players you have right now and start a community saxophone choir!

[Razzy]

Even better, get a bari player, tell the keyboard and drum dudes to have fun on their own and start up a quartet. The most rewarding playing I've ever done was in a good quartet.

[Morry]

Yes, a bass would be nice to even out the sound a bit. Almost any configuration will work if arranged properly.

[HG]

Ya a bass would be great, it gives the low end side of your band, it evens the sound out, plus completes the pyramid.... (more low end) especially with this many saxes, a bass play would be nice to secure and lock down with walks on the low end... btw good luck with your band :D
-Personally, I think sax quartet or quintet is cool, standing in order, bari sax, tenor sax, alto sax, soprano sax..... not sure but i think i've seen a bass sax??? (its lower than bari)

[Grey]

Tenor and Soprano, you sure have lots of friends ;) . I'd say you guys should probably get a bass, or if worse come to worse, the tenor player could do baselines or he could double on bari and do basslines that way... I've done it a lot when jamming with friends, it works pretty nicely actually. Anyways, looks like you've got a nice, solid group to jam with. Good work.