Does anyone know at which hotel the Rolling Stones usually stay when they play in Boston or Washington DC?

Someone here will definitely know, but I live outside DC and if they didn't stay at a Ritz Carlton or the gorgeous Hotel Monaco across the street from MCI, I'd be surprised.

Try the Four Seasons in both cities

pool's in but the patio ain't dry

When they played FedEx Field (Washington, D.C.) on their last tour, they stayed at the Ritz-Carlton at 22nd & M. It was only a few blocks from my office, and I did a double-take when I passed Charlie on the street heading into the lobby as I walked past to pick up lunch!

Oh, and when they played Boston back in '98 or '99 (can't remember which, only that it was during my Sophomore year) they stayed at the Four Seasons, or at least had some sort of headquarters there: a friend of mine picked up "VIP tickets" (which turned out to be ordinary seats, ha!) from a hospitality suite there...