Tennis Teams or Affordable Tennis Clubs?

I just moved to Philly, and I'm looking to play regularly and hopefully move up from the 3.5 to 4.0 level. I've tried going to tennis meetups, but I'm hoping for a more competitive environment. Are there any women's 3.5 tennis teams I could join? Any affordable tennis clubs that I should consider? 

Also if you're a 3.5+ tennis player who's looking for a hitting partner, please let me know--especially if you play year round and know of some good indoor courts. I live in Old City. Thanks.