On Sunday there are two meetings (Public Talk 30 minutes, Watchtower Study 45 minutes), the first is opened up with a song and prayer followed by the 'public talk' that an approved 'Brother' drafts (or simply reads verbatim) from an outline provided by the Org which can be compared to a sermon. All just sit and listen. The second meeting is called the 'Watchtower Study' it too is started off with a song followed by a paragraph by paragraph (unless they are combined) reading from the selected WT article from the Watchtower-Study edition (not the 'public Watchtower' that is distributed in field service), after each paragraph(s) a question(s) is purposed from the bottom of the page and the audience is called upon for comment. Usually the commentary is just a reiteration of the paragraph stated with openers like "I really appreciated' or 'As the paragraph highlights'.... when the paragraphs include the commandment to 'read scripture' all flip their bibles to the passage, the WT Conductor may ask for 'deeper' comments to include other non-read scriptures found in the paragraph(s) too.
Communion is only for the 'anointed' and only done once a year on the evening of Nisan 14 (March 30 this year). The 'anointed' are allegedly those who claim to be of a literal 144,000 class of Xians who are joint-heirs with Christ and will rule with him in the 'new system' (millennial reign). Until 2007 this number was supposed to be sealed in 1935 but apparenly the Govening Body of the WTS has decided to open up its membership again as remaining GB who qualify under the sealing die off and are replaced with younger men.
Not passing a plate is a hallmark of the religion dating back to the 1870s (though there is a donation box at the back of the Kingdom Hall)........not that there isn't occasional commentary as to how members can donate, discussed during the mid-week service meeting. During the circuit or district events such as the circuit assembly, special day assembly and district convention there is always strong and repetitive comments on where the donation stations are located and ending with a summary of monies collected and facility costs.... these events are the WTS's money makers.
Visitors can expect to be 'love-bombed'... Mark Waldman who co-authored the book "Why We Believe What We Believe" in an interview with Tavis Smiley said he loved visiting churches ......and his all time favorite due to the love-bombing was the JW Kingdom Hall. Ours is a religion sustained not on retention but on conversion so love-bombing is an automatic response for many. However if the visitor pops in and expects to fully participate but goes beyond the comfort of the local BOE.....his microphone will be cut off, if he continues to be a 'distubrance' he will be asked to leave.......that said most visitors don't participate, they only observe.
Hope that was helpful......