[rmsstrider]

I am to be the host at an Open Mic at my Retail store after hours. This is part of a winter seminar series we put on. The owner thought this would be a nice change from just having speakers. The area will support 60-70 people seated in folding chairs on the carpeted area of the store with high ceilings. We roll out the softgoods racks for this. I have not done this before, so I am asking for advise.
First, my setup. I will be using my Bose L1 compact. I normally go through a TC Harmony Singer to a Bodyrez pedal to an RCF Lpad 6 channel mixer and then to the Bose. I have both a Sennhieser e835 and a Shure Beta 57a mic.
1. Should I place the Bose on the ground and use the tower or raise up on a table. I am afraid the base will get lost at floor level. I don't have access to a raised platform.
2. Which mic?. I am thinking the E835 might be best.the Shure could be too Hot?
3. Should I eliminate all the pedals and just go straight to the mixer?
4. Should I provide a stool for those that like to play seated?
5. Anything else?