What about a Park for this Installfest?  There
are several parks that have large pavilions with electricity.
For example, south Mpls has the Minnehaha Falls,
I think Round Lake has several good sized Pavilions.
We would need to find one to reserve,
with some cost involved.  I don't know how much they
cost or availability.

Might be nice to consider for a few monthly meetings
during the summer as well.

Karl.