I am a Marriott Platinum looking to possibly switch to SPG. The primary reason is that the services available at Marriott's concierge lounges are becoming less every day. When searching through the Starwood properties it appears that Sheratons are the only ones with Concierge/Executive lounges. Are there no lounges for Westin, W, Le Meridien etc.?

If so, even a lesser lounge is better than no lounge at all. Thanks