Seldom Blues is located within the Renaissance Center Mega-Complex. I want to say it's in building 400. Basically, you have to ask one of the friendly security guards in the building where it is because the RenCen is confusing. There are a few cheap parking garages attached to the RenCen that you can park in and just walk to the restaurant within the building.
Anyway, Seldom Blues is a way cool restaurant and martini bar. The place is enormous with a beautiful view of the river and Windsor. There is a large stage and usually a live jazz act on stage. The bar is *very* well stocked with upscale liqueurs and martinis.
This place is the absolute perfect place to take a date after dinner or a show/play/opera downtown. I've never had the food, so I cannot judge the food, but the drinks were delicious (although very pricey).