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Oh Lindsay, it’s great to see you back to your old partying habits. Plus what 16-year-old wouldn’t want a sister like you to hit the clubs with? You can get good stuff.

Friday night, Lindsay Lohan (seen here last night arriving at the famous Roxy Theatre) and sister Ali Lohan hit up Teddy’s in West Hollywood. According to RadarOnline.com, sisters danced wildly and when they came off the dance floor Lindsay was chainsmoking inside the lounge (CRIMINAL!).

Lindsay and Ali bumped into Forgetting Sarah Marshall‘s Jason Segel, and freaked out. Ali headed home, and Lindsay and Jason left Teddy’s and partied at Adam Levine’s until nearly 6 a.m. when they were then spotted at the Chateau Marmont, with Jason getting out of the car.

So do you think they did it? If so, I’ve lost all respect for Jason.

Gallery Info: Lindsay Lohan arriving at the famous Roxy Theatre in West Hollywood to see Benji Madden deejay.