Friends and family streamed in and out of Mimi O'Donnell's house on Tuesday as she made preparations to bury her longtime partner, and the father of her three children, Philip Seymour Hoffman.

Celebrities including Annie Leibovitz and Bobby Canavale paid their respects, as O'Donnell made preparations to hold a private wake and funeral this week.

A few blocks away from O'Donnell's house, and a few blocks further from where Hoffman died, sits the 50 Perry St Workshop, which hosts AA and NA meetings, many of which Hoffman attended.

In fact, an AA member told FOX411 he spotted Hoffman at a meeting just about a week before the actor died. The source told us the actor came to an 8:30 p.m. meeting and didn't appear to be drunk or high.

"[Hoffman told the group] 'I'm doing OK. Little situation in life. Life still shows up," the source recalled.

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Eddie Donohoe, 58, said he used to see the star at meetings as well.

"He used to come to meetings, I guess he was trying," Donohoe said. "Usually people don't come to meetings if they pick up, because people will know if they're high."

Donohoe, who said he was in meetings with Hoffman at least a dozen times, said the actor seemed like a nice guy when he came to the center.

"He was regular guy, he was polite and well dressed, very sociable with people," he said. "He would come in daytime or evening. Last time I saw couple months ago. People surrounded him. He had his own clique."

Donohoe said you don't have to say anything in the meetings, but Hoffman would often speak to the group.

"He would speak. Sometimes he would share. He might raise his hand and say something, what he was going through that day," Donohoe said.

Hoffman's death hit the group hard, according to Donohoe.

"Everybody [at the meeting] was sad about him dying," he said.

Hoffman, 46, was found dead in his apartment Sunday of an apparent heroin overdose.