Luke 5:29

‘And Levi made him a great feast in his house, and there was a great crowd of public servants and of others who were sitting at meat with them.'

Levi did not turn his back on his fellow public servants and his friends. He threw a last final great feast and invited them along to it to meet the new prophet. And because he was well known many came. It would include many who paid little heed to the niceties of the Pharisees, although we should note that Jesus almost certainly observed them, for He was not subjected to personal criticism by the Pharisees. They were no doubt watching Him closely for any looseness in His behaviour. It was the motive behind the feast that made it right. It was not a lingering look to his past life, but an attempt to reach out to his friends and fellow-workers with the Gospel.

They would not, however, have been pleased with Jesus being there, any more than they were with His disciples. Even mixing with such people risked ritual uncleanness.