Also, Park Hyatt's Founder's Club restaurant is great for Friday and Sunday nights (if you're bringing someone with you). They have a piano and lounge singer for dancing. Also the "Library" is a great cozy bar on the 19th floor (where registration and the Founder's Club restaurant is also located).
Also, Ritz Carlton has a nice bar (about 2 blocks away) and Four Season has the best lounge, IMHO, in Philadelphia called the Swann Lounge. Their Fountain Restaurant is tops (ok, tied with Le Bec). Unfortunately, Brasserie's service has gone down a little in recent years.
I've stayed here at the PH in the past as at-the-time a non-status member and have been upgraded twice. The first time was my anniversary. Second, I was the event planner for a three day event being held there. Suites do vary in size and quality. (The first one was a nice size but in need of renovation or severe cleaning, the second time, rooms were updated and larger). They have tons of suites here, one on every exterior corner and then about 12 in the interior circle. Very nice hotel and service was just as good as the Ritz Carlton.